John Mash former headmaster of St Martin’s School, Northwood escaped an immediate jail sentence after he admitted sexually assaulting pupils in his care at an independent boarding school in the 1980s.

A former headmaster has escaped an immediate jail sentence after he admitted sexually assaulting pupils in his care at an independent boarding school in the 1980s.

John Mash, 79, of Cobham Grange, Surrey was arrested in June 2014 after allegations of sexual assault were made against him by four former pupils.

The victims told police Mash would enter their dormitories at night and sexually assault boys boarding at the school, St Martin’s School in Northwood, Greater London.

Mash appeared at Isleworth Crown Court on Monday, February 15, where he pleaded guilty to seven counts of indecent assault on four boys under the age of 14.
He was sentenced at Isleworth Crown Court, on Friday, 1 April to two years imprisonment suspended for two years and a two-year supervision order for three of the counts. He was also sentenced to one year’s imprisonment; suspended for two years, for three other counts, to run concurrently.
Mash will also be placed on the Sex Offender’s Register for 10 years and ordered to pay costs of £1,350.

Detective Constable Emma MacDonald, of the Met’s Sexual Offences Exploitation and Child Abuse Command, said: “Throughout this case I have been hugely impressed with the courage of the victims who have relived traumatic incidents from their childhood committed by a man entrusted to keep them safe.

“I urge all survivors of sexual abuse, no matter how historic, to come forward and speak with police.”

Two counts of indecent assault against Mash were left to lie on file.

If you have been affected by anything written in today’s blog, or you need some advice and support, then you can call the legal team here at Verisona Law. We have many years’ experience in sensitively handling many cases like these and we would be happy to help.


Charles has considerable specialist experience in pursuing claims for compensation for those who have been abused in childhood. His specific expertise means that he is recognised locally, nationally and internationally for his work which has taken him all over the world including, USA, Australia and New Zealand.

He is also recognised for his significant involvement in the high profile litigation against St Georges School (Anglemoss Limited) and Cyntwell High School. These cases involved a staggering number of individuals who pursued those responsible whom despite heavily defending the claims brought against them settled by way of out of court settlements.

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Charles obtained his Law degree at Kingston University, before successfully completing his Legal Practice Course. He trained and qualified with Verisona Law beginning his specialism in the field of child abuse claims. He received his higher rights of Audience in 2012 making him one of the youngest Solicitor-Advocates in the country who is able to represent his clients in the High Court. Charles is head of the abuse team who collectively have secured compensation for hundreds of victims of abuse.

He began diversifying in to other aspects of abuse law and his team are one of the very few in the country who specialise in claims against social services.

He is involved in complex group action litigation and also represents a number of individuals and who are pursuing private companies, local authorities and perpetrators in pursuit of their justice.

Charles has strong contacts with some of the most prominent barristers who advise on abuse claims including a number of QC’s. He also has robust connections with highly qualified expert witnesses he instructs in support of those who he represents.

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