Starring John Thaw - The Sweeney is a 1970s British television police drama focusing on two members of the Flying Squad, a branch of the Metropolitan Police specialising in tackling armed robbery and violent crime in London. The programme's title derives from Sweeney Todd, which is Cockney rhyming slang for "Flying Squad".
"Get your trahsers on, you're nicked!" Jack Regan is probably saying to some Lag. "And you, get your knickers on love and make me a cup of tea, we're the Sweeney and we haven't had our dinner yet" he's going to add, addressed to the Lag's bit of pussy.