Best Diving Centers in London, England?

[Atli]

I'm looking to get PADI certified (maybe referral course first, then Open Water Diver and beyond). As there seems to be a surfeit of licensed Scuba Diving centers in the Greater London area I'm finding it difficult to choose between them. I've searched a lot online and come across quite a few which seem better that others (London Scuba, Big Squid, London Diving, London School of Diving etc.). The prices vary and so, I assume, does the quality of the teaching and the instructors.

From experience, does anyone have suggestions as to which one I should choose? Or can maybe suggest a few which are worth looking into?

Thanks very much in advance.

 

[Monkey_Gland]

Def look at Big Squid. Nice folk.