Just found this in Argyll & Bute planning applications this week:-

Reference: 12/00806/LIB Officer: Allocated To Area Office
Telephone: 01436 658882
Ward Details: 20 - Lomond North
Community Council: Garelochhead Community Council
Proposal: Demolition of dilapidated building
Location: Building 7, Garelochhead Training Centre, Helensburgh, Argyll
And Bute, G84 8YT
Applicant: Defence Training Estate (Scotland)
Montrose Block, Craigiehall, Queensferr y, West Lothian, EH30
9TN
Ag ent: DIO LMS Scotland
Forthview House, 30 Hilton Road, Rosyth, Fife, KY11 2L
Development Type: 14 - Listed bldg. + con. area consents
Grid Ref: 226539 - 690333

I see it appears to be a listed building too.

Building 7 is one of the officer accommodation nissan huts. Stayed in it a few times. Consists of a central door in the side with a 4 bunk room to the right and a 6 man bunk room to the left. Toilet and bathroom(with a china bath!!) straight ahead on right and left respectively. Last time I was in it was about 2 1/2 years ago and it was in pretty good condition.

Is this the torpedo test tank?