I'm afraid this song is a little dated now. They've moved them all inside nowadays.
Pitty really. Another London old tradition gone to earth.

Down in Drury Lane

Down in Drury Lane
There are naughty women
Who will do whatever you like
If you've got a shilling
Soldiers half a crown
Sailors half a guinea
Big fat men, two pound ten
Little boys a penny

Transcribed from Songs for Gay Dogs LP, [1963], by Paddy Roberts.

In the first part of the song, the tune is unknown. The part "Soldiers half a crown" matches the medical student's singing.