How can I find rental accommodation for pets in London? Most places seem to say "no pets .." Any ideas?

I am looking for a house to rent in London and I have two greyhounds. It proved more difficult than expected to find accommodation for pets. Does anyone have Any idea where I could begin my search? Tips for pet owners who are renting would be useful. Thanks

I am having the same problem but in Liverpool! However, each agent of assets that have been busy to say that although most owners say "No pets, which often can be persuaded otherwise (obviously they are saying that to make things easier for them, not that I have a problem with that), so you do not have necessarily true and ask to be sure. If they can be persuaded, could be on the condition that you get professional cleaners when you leave, references for the dog or give a larger reservoir, etc. You may want to comply with their dogs by themselves to ensure they are okay. It could also publish a supplement Free housing http://gumtree.com specifying that any potential owner must allow pets. I found my housemates there is a site little big.

An anchorman & a friendly dog