I am coming over to visit my kids in London for August/September and my son told me about this site.
While I found the sign-up process a bit long winded once signed up I actually found a room from a premium(paid) member and have arranged the rental.
I know that the basic free membership meant I could only contact paid member ads, but for me this wasn't an issue, and their help line was very reassuring about my concerns on rental costs.
I used the uk site - uk.easyroommate.com
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