Think I would agree with Lardhelmet. If it's not the New Avengers theme, it's been made to sound very like it.
Is it me, though, or is it supposed to be a very camp-looking ad, especially when Mr Mint lands with his parachute and shrugs it off as he crosses the road?
I think it's meant to be cheesy, camp and very 80s saxy, which is a shame cos I like Pimms (especially the way Mr Helmet makes it) and do they really dye that poor dog?