There aren't many excuses for TV producers to show characters doing the conga to the tune of "Gertcha" by Chas & Dave. In fact, it takes a very peculiar set of circumstances. A time travel drama set in London in 1981. A genuine cockernee knees-up in celebration of the wedding of Prince Charles and Lady Di. And attendance by detectives who were the pride of the Greater Manchester Constabulary in the early seventies.
I can only anticipate a surge in itunes downloads during the week ahead.