...'uncle arnie' they are the largest in europe and have a lot more 'pull' as a result.
Agreed - if the OP did want to go with the new TwinAir model then 'uncle arnie' are currently advertising this at £500 below the already keen list price at 'only' £11100. However some other dealers will match this sort of discount in my experience.
Interestingly all the other great deals that Arnold Clark had 6 months ago on their website for new 500s appear to have been pulled. I wonder if Fiat have had a quiet word.
Something else that the OP might want to check out is an ad for multiple 1.2 Sports with just 5 miles at Arnold Clark - see http://www.arnoldclark.com/used-cars/fiat/500/1.2-sport-3-dr/2011-(11)/ref/cc_ygjkp1a2j6dvmuoh/ - you never know they might just have a black one...