The "rioters" were students from the Old Vic drama school in Bristol, including former chorister Aled Jones.
Producer Gareth Gwenlan, who held an Equity card from his time as an actor, played a riot policeman, enabling him to direct the actors, and stopping them from getting carried away during the riot.
Following this episode, many people assumed that was the end of the series because it would be three years before the next episode, but John Sullivan was keen on tying up the loose ends by making the Trotters millionaires.
The "Russian Army Camcorders" were genuine (but by then, defunct) broadcast television cameras used by the BBC in the 1980's, painted with camouflage by the props department.
It seems very unlikely that Del ( or Denzil and Trigger) wouldn't remember that his girlfriend from the bookmakers, whom he says he was serious about, was Marlene (Boyce).