Peter joined Shaw Graham Kersh in 1999. He is a highly experienced police station advisor and case worker. Peter is integral to the general crime team.

Explore our rankings and lawyer testimonials in the UK's leading legal directories: Chambers & Partners, Legal 500, and The Times

Please Peter's reviews on Review Solicitors

"Peter was brilliant, couldn’t have asked for a better [lawyer]. He made me feel comfortable, was dedicated and put my family and I at ease. It was easy to contact even outside office hours"

"I know a good lawyer when I get one. Peter Walsh was excellent - will recommend - keep up the good work!"

"Easy going and easy to work with. Offered me the best advice"

2025 Woolwich Crown Court (Ongoing)
Attempted murder and possession of firearms with intent to endanger life. The defendant is alleged to have been involved in the shooting of a victim who was sitting in a vehicle. Police report that the shooting was in response to the victim allegedly disrespecting the co-defendant some time earlier.

2025 Guildford Crown Court (Ongoing)
Murder. Representing a man who faces an application under section 76 (double jeopardy law) of the Criminal Justice Act 2003 to quash his acquittal for murder some 7 years ago. If the Crown are successful, the defendant will be recharged with murder alongside offences of perjury, perverting the course of justice and assault which relate to the evidence he gave during his previous trial.

2025  Central Criminal Court
Attempted murder. The defendant was charged with attempted murder involving the discharge of a firearm and multiple stab wounds to the victim, as well as possession of a firearm with intent to endanger life. Charges dismissed following our application to dismiss.

2024  Chelmsford Crown Court 
Murder. The defendant, a young man, was charged with the murder of a father in front of his 12 year old son. The evidence in this case revolved around a number of eyewitnesses, Ring doorbell footage and audio recordings which captured events.

2023  Central Criminal Court
Murder & robbery. Client was one of 5 defendants alleged to have targeted the victim, who was stabbed 5 times at his home address, and stolen drugs and money in the process.  The case revolved around CCTV, cell site and forensic evidence. Client acquitted of murder – convicted of lesser charge of manslaughter.

2023  Central Criminal Court
Murder. Client charged with murder and conspiracy to rob – client one of 3 who were alleged to have targeted and robbed the victim of a watch believed to be valued at between £250,000 - £350,000 in the City of London whilst on a night out. During the robbery the victim was stabbed in the chest which pierced his heart. Case revolved around CCTV, ANPR and cell site evidence. Client acquitted of murder – convicted of lesser charge of manslaughter.

2022  Southwark Crown Court
Attempted murder. The defendant was originally charged with attempted murder following a shooting on a residential street in East London with a number of others. Following discussions with the prosecution, the defendant pleaded guilty to conspiring to possess a firearm with intent to cause fear of violence.

2021  Woolwich Crown Court
Attempted murder. The defendant approached Peter following a recommendation, having been convicted of 4 offences - possession of firearms x 2, possession of ammunition and possession of a bladed article - on an 8 count indictment. During his first trial, where he was represented by a different legal team, the defendant denied being present at the scene. Having transferred representation to SGK, the defendant faced a re-trial for attempted murder and possession of a firearm with intent to endanger life.  It was alleged that the defendant and 3 others sought to avenge the murder of a friend some years earlier. They chased the complainant in a vehicle from which he decamped – the pursuit continued on foot which was largely caught on CCTV. One of the others, with the defendant, used a sawn-off shotgun to damage the vehicle the complainant had decamped from. Unfortunately, the sawn-off shotgun accidentally discharged into his own chest causing him fatal injuries. During the retrial the defendant accepted presence at the scene but denied any intention to kill or intent to endanger life and was found not guilty within 2 hours.

2020  Criminal Cases Review Commission (Ongoing)
Murder. Advising in a referral to the CCRC following a conviction for gang related murder in 2009. This matter is being investigated and witnesses traced and interviewed in anticipation of a submission to the CCRC with assistance of junior counsel and KC.

2019  Central Criminal Court
Murder. Represented two cousins tried with 2 others in a 9 week trial relating to a gang murder in which the victim was shot with a sawn-off shotgun at point blank range. This case centred on mobile phone evidence and evidence from a car tracking device that was being driven by one of the defendants. Both cousins were acquitted of murder and manslaughter. One of the cousins was acquitted in 2017 of another gang murder at the Central Criminal Court in relation to which Peter also represented him.

2019  Ipswich Crown Court
Murder. Defendant charged with the murder of a gang member following a drug ‘turf war’ between two groups in the Ipswich area. The victim was stabbed 13 times in close proximity of his home address. The case involved mobile phone analysis, DNA expertise, car tracking evidence and the instruction of a Forensic Pathologist on the topic of blunt force trauma. 

2025 Inner London Crown Court (Ongoing)
Representing a defendant who faces allegations of conspiracy to convey unauthorised articles (mobile phones, chargers and tobacco) and drugs into prisons across the country using drones. 

2025 Portsmouth Crown Court (Ongoing)
Representing a defendant charged with conspiracy to supply class A and B drugs through the EncroChat network. The defendant left the jurisdiction whilst under investigation. Peter assisted the defendant in returning to the UK with the assistance of the Home Office and the relevant police force to face proceedings, due to his lack of a passport. The allegations relate to the supply of up to 390 kilograms of cocaine across the UK. 

2025 Lewes Crown Court (Ongoing)
Production of cannabis. Representing 2 defendants alleged to be involved in the production of cannabis on a commercial scale in the Sussex and Thames Valley areas. It is alleged that the  defendants have been involved in production for a number of years, utilising commercial units rented for the specific purpose of producing cannabis.

2025  Isleworth Crown Court (Ongoing)
Importation of cannabis. Representing a defendant charged with the importation of 28 kilos of cannabis from New York into Heathrow. Investigation led by the NCA. 

2025  Snaresbrook Crown Court (Ongoing)
Conspiracy to supply class A drugs (19 handed). Drugs supplied over a 4-year period across East London. The evidence in this case revolves around observation evidence, cell site and ANPR  evidence. The evidence currently relied on by the Prosecution is in excess of 16,000 pages and it is thought that over £7,000,000 worth of cocaine and heroin were supplied. 

2024  Basildon Crown Court
Conspiracy to supply class A drugs. The defendant stood trial alongside six others, charged with conspiring to supply significant quantities of class A drugs following a proactive observation-led investigation by the NCA in the Grays area of Essex.

2024  Snaresbrook Crown Court
Conspiracy to supply class A. 2 year drugs supply across Newham, East London. This case was investigated by the Gangs Unit targeting drug dealing within the borough.

2023  Aylesbury Crown Court
Assisting an Organised Crime Group. The OCG was involved in the supply of significant quantities of class A drugs and laundering millions of pounds.  This investigation by the South East Regional Organised Crime Unit revealed a sophisticated criminal network equipped with firearms and encrypted devices (Encrochat). Charges were based on his actions whilst undertaking a role as a defence consultant at a firm of solicitors in London, consistently defended on the basis they revealed no criminal activity on his part. A submission of no case to answer to that effect was successful bringing proceedings to an end.  

2023  Portsmouth Crown Court
Conspiracy to supply class A drugs. Supply of drugs through encrypted devices (Encrochat). Allegation centred around drugs being supplied from an Organised Crime Group, supplying in excess of 10 kilos per week and operating across the UK. The case against Peter’s client was discontinued. 

2023  Leicester Crown Court
Conspiracy to supply class A drugs. County lines drugs operation being run from London to Leicester for 10 months. Evidence revolved around the movement of drug phones, which co-located with personal phones. In excess of 15,000 pages of evidence served.

2022  Leicester Crown Court
Conspiracy to supply class B drugs. The defendant was one of 9 charged with conspiring to supply drugs into HMP Gartree, including to prisoners serving life for murder. The case revolved around cell site evidence and messages found on illicit mobile phones within HMP Gartree.

2021  Bristol Crown Court
Conspiracy to import class B drugs. The defendant faced a 4 count drugs indictment which included the importation and distribution of significant quantities of drugs. This case centred around the use of encrypted devices (Encrochat) which enabled individuals to exchange messages and photos anonymously until the servers were hacked by French authorities. The messages from the Encrochat showed that in excess of 50 kilos of cannabis and ketamine were being supplied.

2021  Snaresbrook Crown Court
Conspiracy to supply class A drugs (15 handed). Undercover police operation around the East  London area. In excess of 40,000 pages of evidence served. Modern Slavery/duress issues raised – the prosecution offered no evidence on day 1 of trial following disclosure requests by the defence.

2020  Wood Green Crown Court
Conspiracy to supply class A drugs and conspiracy to manage a brothel. Client pleaded guilty to managing a brothel but denied, and was acquitted of, conspiracy to supply class A drugs following a 10-week trial. The case attracted extensive media attention given the involvement of a former England Rugby captain.

2018  Kingston Crown Court
A multi-handed allegation of conspiracy to supply class A drugs arising out of an Organised Crime Command investigation over a 14-month period. The investigation resulted in the seizure of over 100 kilos of cocaine and hundreds of thousands of pounds in cash, with in excess of 100,000 pages of evidence served. The Crown asserted that over a tonne of cocaine was supplied using encrypted devices known as PGP, BQ Aquarius and Encrochat devices.

2025 Kingston Crown Court
Representing a client who is one of six defendants charged with possession of firearms with intent to endanger life.

2023 Kingston Crown Court
Firearms with intent to endanger life. Represented three defendants charged following a pre-planned police operation. 3 firearms and ammunition were found hence the allegation being that these weapons were ready to be discharged.

2023  Inner London Crown Court
Possession of firearm with intent to endanger life. Seizure of a loaded handgun believed to have been possessed in readiness for a shooting.

2018  Snaresbrook Crown Court
Possession of firearms with intent to endanger life.  The defendant was charged with possession of 2 sawn off shotguns which were found in a car. Not guilty pleas were entered and, following requests for disclosure, the prosecution offered no evidence.

2024  Central Criminal Court (Nightingale Court)
Transferring criminal property.  Successfully defended a client charged with transferring criminal property by allowing his bank account to be used. Despite the client admitting that he believed the money to be suspicious (while unrepresented in interview) the jury were unable to reach a verdict. Following defence representations, the Crown did not seek a retrial and offered no evidence against the defendant.

2022  Snaresbrook Crown Court
Conspiracy to Burgle.  The defendant was charged with others in relation to planned burglaries of storage units across East and South East London. In one burglary alone, items valued at over £1,000,000  were stolen.&

2017  Blackfriars Crown Court 
Conspiracy to evade duty. This case related to the importation of in excess of 2,000,000 cigarettes which were concealed within lorries disguised by pallets of car parts. 

2017  Isleworth Crown Court 
Conspiracy to facilitate breaches of immigration law. The defendant was charged alongside 7 others with people trafficking. The case arose from an undercover newspaper (The Sun) investigation of ‘reverse’ people trafficking.

2017  Southwark Crown Court 
Conspiracy to facilitate breaches of immigration law. The defendant was prosecuted with 6 others for his role in organising ‘fake sitters’ to sit examinations required to extend UK visas. This case was subject to an investigation by BBC programme Panorama.