Since the early 1980s, David has led in numerous high profile and serious cases, beginning with the multi-million pound robbery of a Security Express vehicle and then in 2 of the trials resulting from the Brinks Matt gold bullion robbery (which were at the time the largest of their kind ever in the UK), went on to lead in a number of further armed robbery cases during the next 10 years involving in particular members of the Arif family and their associates. He also represented Ronnie O’Sullivan (the father) for murder.
Then, in the 1990s, David led at the Central Criminal Court for Kevin Cressey, charged alongside a police officer with drug and corruption offences in what became known as the Panorama Corruption trial, because the client had gone to the BBC with his story. During the course of that decade, however, most of David's leading work involved the very large importation and supply of Class A and B drugs (including one of the many cases in which the super-grass Michael Michaels was a prosecution witness), serious violence, and fraud. Belchamber and Others (Southwark Crown Court) for example was the alcohol diversion fraud which finally exposed the London City Bond as informants and led to a number of successful appeals in other cases.