When Carter is shot at the very end of the film, his shot gun falls clear of his body. In the following shot as the sea washes around his body, his hand is resting on the gun.
John "Biffo" Bindon (played Sid Fletcher) had numerous roles during the '60s-'70s as the gangster-type. In real-life he had a violent temper, provoked pub fights and ran a protection racket. It's been suggested that he was known to associate with organised crime leaders the Kray twins and the Richardson Gang, but the extent of his involvement in the English underworld has never really been proven. In 1968 he was awarded the Queen's Award for Bravery (a police bravery medal) for rescuing a drowning man by diving off the Putney Bridge into the River Thames. Some have said that it was Bindon who pushed the man off the bridge but was forced to rescue him when a policeman showed up. By 1971 Bindon went into organising security, which had unfortunate results when hired to be security co-ordinator for Led Zeppelin, during their U.S. concert tour. Then in 1978, Bindon was in a knife fight with London gangster John Darke, which resulted in Darke's death, and by 1979 was on trial where the prosecution claimed it was a contract killing. Defence argued that Darke's death was in self defence (there were allegations that while awaiting trial Bindon bragged to a cellmate that he was a hitman). Though Bindon was acquitted of Darke's murder, his reputation was badly damaged and he became reclusive in the 1980s, before his death in October '93, of AIDS.