"Brand New Key" was a song which was sung by Bliss and Ursula Blake. (TV: Love & Monsters)
Bliss and Ursula were heard to sing, in part:
I got a brand new pair of roller skates
You got a brand new key
Behind the scenes
The song in real life was composed and performed by American singer-songwriter Melanie Safka (known by her stage name as ‘Melanie’) in 1971. It was then later adapted into, and is most recognisable as, a parody of the original entitled ‘The Combine Harvester’ by the British band, the Wurzels. It has since become their most popular song, as well as a cult favourite in the UK.