I have bought and sold three times before, but always exchanged and completed on the same day.
We are now in the running for two properties (very long story) and are pushing for exchange on the property we are more hopeful about. We were prepared to exchange quickly but then have a longer completion period (which is what our buyers have agreed for us).
We don't have £47.5k hanging around in the bank - as the deposit for our new house will come from our old one.
I'm sure other people are in this position - what happens? Does the mortgage company provide a bridging loan?