The title uses a pun in the term Bellman which in the film's case refers to a criminal who specialises in disabling intruder alarm systems.

A few days later, the child is kidnapped by Gort and Hiller is also captured: both are taken to a derelict house where he encounters Salto (Hope).

It transpires that Hiller is a computer programmer who Salto had bribed to obtain details of the security system at a bank near Heathrow Airport.

The guards, finding nothing, assume the call is false whilst the gang actually use a small window of time to enter the bank, allowing The Peterman (Whybrow) to determine how to access the basement vault area.

They then release tear gas to disorientate the guards and escape in a getaway car driven by The Wheelman (Dowdall).

The Guv'nor is frightened that he has broken a criminal code of conduct that no one gets hurt and is afraid that the identity of the gang will be made known to the police.

Terms such as the Guv’nor (boss), Bellman (alarm disabler), Peterman (safebreaker) and Wheelman (getaway driver) are used to hide the identity of the characters.

The opening scenes were filmed in and around Paddington Station and the hotel where Hiller stays is near Praed Street.

The scene where Hiller is being chased was filmed in Bayswater with Redan Place and the then closed Whiteleys department store visible in shots.

The scene where the Guv’nor threatens Hiller by the side of the motorway was filmed on the M25 between junctions 14 and 15 next to the Colnbrook bypass overbridge.