I was thinking on the same line myself but thought that perhaps Richmond is dear perhaps because of the river, a lot of the areas around Heathrow are fairly dire. I'm just concerned as I have recently moved from St Albans to Harpenden (renting with consideration to by) but am quite concerned about the expansion, however I am still keen to stay. They are planning a new runway a mile south of the existing one large enough to handle 747's and airbuses and such and where I am it's already fairly noticable.