Houses are rarely bought for cash?
http://m.huffpost.com/uk/entry/7499994
38% of houses in Q1 2015 were bought for cash, up from a 2014 average of 36%. Downsizers, BTL and investors often buy with cash, even with today's low interest rates. In part, this is why an interest rate rise won't crash house prices and why, going forward, rate rises and availability of credit will have a diminishing impact - the number of houses with an outstanding mortgage is dropping all the time.