Advertising online for flat to let in London

[MangoMonster]

I used to use Gumtree which was excellent, however, they have started charging quite unreasonable rates.

What other sites do you use to advertise your property to rent?

[jkklpu]

www.upad.co.uk/
We used them when changing tenants - they were fantastic, really fast, did exactly what they said and good customer service.