After Reading this thread I noticed that No:3 cylinder was not firing (hence my enquirey about carb cleaning prices) well after some investigation for cheaper fixes I found this product 'Wynn's Air intake & Carburettor Cleaner'. I gave it a good blast in the intake of the carbs and shazzam as if like magic I'm firing on all 4 again.
If anyone is interested I got it from Euro Car Parts for about £3 something for a 500ml can otherwise it's in Halfords for about £7, you probably can get it cheaper somewhere online.