Bertie Smalls

That year, the annual total of armed robberies in the Metropolitan district was 380 – partly because the culture was rife with bribe-taking, sharing in the proceeds of crime and "verballing", or fabricating evidence against suspects.

Sir Robert felt compelled to remind his detectives which side of the law they were supposed to be on, he told them in his inaugural address: "A good police force is one that catches more criminals than it employs."

[2] Sir Robert pushed such investigation – of names such as Mehmet Arif, George Davis, Ronnie Knight, Freddie Foreman, Micky McAvoy – out to the suburban regions, who needed to employ new tactics to catch the bigger criminals they were now faced with.

On 9 February 1970 Smalls led a team of robbers from The Wembley Mob, including Mickey Green, on an insider-led raid on a branch of Barclays Bank at 144 High Road, Ilford.

Most of the team left England via various routes – Smalls via ferry from Newhaven to Dieppe, train to Paris and then flight to Torremolinos – for the Costa del Sol, where they read the English newspapers for updates on the police search for them.

Later supergrasses, such as Maurice O'Mahoney, in 1974 then one of Britain's most violent armed robbers, who turned in more than 150 names in exchange for a much-reduced sentence, couldn't escape prison if they had committed serious crimes.

From 1977, Lundy often had four trials per week running but met his match in Michael "Skinny" Gervaise, the leader of 24 March 1980 silver bullion robbery – then the largest in the UK.

Within a few years of the trial he had returned to his old haunts in north London, drinking openly in the pubs around Hornsey and often boasting he was paid £25 a week by Scotland Yard for his betrayal.

Bobby King, one of the robbers his evidence convicted and who was later held up as an example of the positive side of prison, once saw him in Crouch End but said he saw it as a test of his rehabilitation that he didn't whack Smalls.