[CR]Yet another "What bike is this?" question

Example: Framebuilders:Dario Pegoretti

Date: Tue, 23 May 2006 12:49:26 +1000
From: nada dickinson <nada@chathamhill.com>
To: classicrendezvous@bikelist.org
Subject: [CR]Yet another "What bike is this?" question

I'm hoping someone on the list can indentify this frame for me. I have done some searching on the net without any success.

It has been repainted, probably more than once so the only stickers on it are for a bike shop which is now out of business.

I think it is a 1980s steel frame, very light (weighs about 5 lbs), has provision for downtube shifters, I have been told by the previous owner that the bottom bracket is English thread and that it has a 1" JIS threaded fork. The serial number is GB 900686 and is located on the underside of the downtube.

Here are some photos (I have a couple of others if needed)