temporary home for 2 cats needed July / August

Hi , we are having building works in July and August and need to find a temporary home for our 2 very friendly and affectionate cats. The cheapest cattery we have found is outside of London and the best part of £1000. Is there anyone local who likes cats, is not going away for July and August and who has a cat flap (or who wants a cat flap) and who would be interesting in having the 2 cats for a more modest fee. Food would be provided. Annette