Does any1 know of any good websites or letting agenies where i can find affordable homes/studio flat to rent?

i am looking to rent in the south west london area.. and i would ideally like a studio flat or one bedroom flat (anythings with ..STRICTLY NO HOUSE SHARES)
i would like to spend around maximum £450 per month renting..
but i cant find any good websites and am i stuck and dont know where to look next.

does anyone know of any sites i could look at?
or agenies that could help?

Sell and Rent Back

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