We want to sell our house and ideally would by a new build. Due to the market I think it could take a long time to sell our house. Reading about it with new builds you need to exchange eg a month or so after you reserve a house. This wouldn’t work as I won’t exchange on a new house without simultaneous exchange on my house - otherwise if I don’t sell my house I could end up need to complete on the new build or lose my deposit while still owning my house. Anyone know how this works in practice?