Norton Commando 850 in Movies
Engine
The engine was a Air cooled cooled Four stroke, parallel twin cylinder, push rod 2 valves per cylinder.. A 77 x 89 mm stroke result in a displacement of just 829 cc / 50.6 cu in. The engine features a 8.5:1 compression ratio.
Chassis
It came with a 4.10-19 front tire and a 4.10-19 rear tire. Stopping was achieved via Single disc in the front and a Single disc in the rear. The front suspension was a Telescopic forks while the rear was equiped with a Swing arm with Girling coil springs The Commando 850 is fitted with a 19 Litres / 5.0 US gal fuel tank. The wheelbase is 1440 mm / 56.7 in long.

On The Beat - The British Policeman 1900-1984 EP: Extras
Writing looks like Commando 850 LT - does that make sense?? with LT beeing the hook of big C in Commando https://www.flickr.com/photos/30311970@N07/7476346328/ Nice link. So it's the Greater Manchester Police Museum. No doubt a wonderful museum to visit, but do they put useful information online about their cars and bikes? No.
the same with museum round the corner here http://sinsheim.technik-museum.de/