Cool It Carol (1970, Pete Walker)
London. It's all happening, if you know where to look.
Two bumpkins travel to the big smoke in search of new horizons. What they find isn't on any map ahem. Whilst the boy flounders, the girl finds that city folk can be very hospitable ahem.
Falling in with some shady sorts, they find work is where you find it.
Tis all a bit twee in the end, but I chose to see this in a positive light.