Mark Tomassi

Mark Tomassi

Year of Call: 1981
Inn of Court: Middle Temple

Mark Tomassi

A very experienced highly regarded courtroom advocate, who is fearless and effective in his approach. He is regularly instructed in heavyweight criminal cases and has acted as a leading junior in two of the longest-running and largest criminal trials ever.

He is noted to be a good listener, with a relaxed and approachable manner at the case preparation stage.  He gains the confidence of others in difficult situations and has an ability to assimilate vast amounts of detail in a narrow time frame.

In addition to his normal workload of very serious criminal cases, including murder and fraud, he accepts work in the High Court and in the Court of Appeal on reference. He is retained mainly by Legal 500 firms but is willing to travel nationwide and internationally in appropriate cases. He has represented individuals accused of murder in the Caribbean and was recently successful in the Court of Appeal (Cayman Islands) in overturning a murder conviction.

Significant Cases

  • R v. Celbequiri and Others – A ten month drugs trial.
  • R v. Malcolm Sayers and Others – An alleged MTIC case stayed as an abuse of the courts’ process.
  • R v.  Oliver and Others – A massive drugs case dismissal judgment referred to the Court of Appeal.
  • R v. Martinez McLaughlin – Successfully overturned murder conviction.
  • R v. Shane Dedman – Successful in resisting unduly lenient sentence for attempted murder.
  • Wiseman v. Sullivan – Libel case: Mark acted for the client of solicitor who claimed to have been overcharged for work.


  • BA (Hons), Anglia Ruskin
  • Criminal Bar Association
  • Criminal Appeal Lawyers Association

Areas of Specialism


He is instructed in an Office of Fair Trading case due to last three months. He also has a specialist knowledge of VAT carousel fraud and a proven ability in cases where the prosecution has failed to disclose essential material.


Asset Confiscation

He has a wide knowledge of asset confiscation work.  He has recently been engaged in five High Court trials in the current year. He is regarded as someone who can get the best out of any case and situation.

Major drug trials have included representing the only westerner ever to successfully escape from the ‘Bangkok Hilton’ prison.



He is regularly instructed in high profile cases for crimes such as R v. Celbequiri and Others that lasted ten months in total.

He accepts work in the High Court and in the Court of Appeal on reference.


Other Details

Mark is an Advocacy teacher to the College of Law and writes publications for the legal press.


Mark was retained by Granada television in the nationally screened drama series ‘when a woman kills her man’ which addressed the “slow burn” theory of female provocation as a defence to murder.