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In that case just get a decent set of over ear headphones. A lot these days even have a mic built in if you need one.
eg.
http://www.richersounds.com/product/all-headphones/akg/k451/akg-k451The only thing that may be different about "gaming" headphones is more design consideration to long term comfort and a mic. All over ear ones will be good at sound isolation.
These Sennheisers are popular:
http://www.johnlewis.com/sennheiser-hd-558-full-size-headphones-with-e-a-r-technology-black/p1756614?sku=234116001&kpid=234116001&s_kenid=fa08906f-2cf2-4939-a7bc-860156644a50&s_kwcid=402x355810&tmad=c&tmcampid=73But I would go for the Bose Soundtrue for that money
http://www.johnlewis.com/bose-soundtrue-ae-ii-full-size-headphones-with-in-line-mic-remote-for-samsung-android-devices/p2203293?sku=234682423&kpid=234682423&s_kenid=fa08906f-2cf2-4939-a7bc-860156644a50&s_kwcid=402x1088766&tmad=c&tmcampid=73I used a pair of Steelseries 650 headphone for a focus group play test and they were like wearing a pillow, it was amazing. But they're not really what you're looking for.
Cheers for the recommendation, much appreciated. Really need them to look good too though. Can't be dealing with big bits of plastic on my head. Saw some nice looking Seineisssiitersnes or whatever they are called but crap reviews...