From another post here a while back, the whole (live) album is available on Youtube here and bears a listen too:
The Truth about 1812

Nudist Colony is - Track B2:

The Truth about 1812.
A1       Bernard's Motor Car      
A2       Girlfriends      
A3       Nurse      
A4       1812      
B1       Two Little Chaps      
B2       Nudist Colony      
B3       Effluent Society      
B4       She Was Poor But She Was Honest      

Credits
Design – Hunt Emerson, Ralph Wigg
Engineer – John Hassell
Producer – Joe Stead
Vocals,Flute,Horn – Derek Craft
Vocals,Guitar – Geof Bodenham

Notes
Recorded At The Black Horse Folk Club,Amberley On
Monday 27th January 1975.

[Listing from discogs.com]