What is the motorcycle in the Dunhill Pursuit TV advertisment?

I think you will need a real classic enthusiast to be able to identify that from the very limited glimpses of it in the advert.





If I was forced to make an educated guess I would say a Norton but am basing that as much on the silver colour of the tank as anything else.|||The city scenes appear to have a Norton (30's vintage). The paint scheme on the tank, the gas cap and steering dampener all match a mid 30's Norton Manx. Because there are 2 gages rather than 1 it is likely to be the International model. The dirt road part of the ad could be a more modern bike masquerading as the bike from city scenes. Except one disturbing detail. The rider puts his right foot to the ground as if he is not in full control of the bike. Is it a super model riding over his head, or an old fashioned bike with street tires that was showing it's dislike for the dirt? Perhaps both.