Slim fit chinos in London

[inimitable]

I know this question has been asked a million times but i'm bound by time constraints so here goes -

Where are some good places to buy slim fit chinos (specifically in London)?

I have to go to Dubai at short notice so can't order online, looking for a couple of pairs of light coloured chinos (uniqlo & gap spring to mind but not sure about quality) A decent price would also sweeten the deal...