Gareth Jenkins, co-architect of flawed Horizon IT system, was expert witness in wrongful prosecutions of operators

A former IT engineer has admitted he changed crucial expert court testimony at the request of the Post Office during wrongful prosecutions of branch operators.

Gareth Jenkins, a former senior engineer at the contractor Fujitsu, on Tuesday told the public inquiry into one of the biggest miscarriages of justice in British history that lawyers had asked him to change witness statements.