Had a chat with a friend yesterday and she said at exchange you pay your deposit and have to get get house insured but you don’t own it or can’t move in for a week or so.. is that right? Seemed a bit strange!
if you're selling and buying simultaeniously you will never actually physically pay your deposit on the new place.
For instance, you accept an offer on your flat. You see a house, and put an offer in which gets accepted. You appoint a solicitor or conveyancer. You apply for your mortgage on the new place (generally purchase price minus the equity you have in the flat, or a percentage of that if that's what you want)
your solicitor will work with the chain you so complete on the sale and the purchase on the same day. The sale of the flat will go through, then your solicitor will get your equity which they will pass to the mortgage company (and if there is any remaining, to you) and then complete on your purchase (the mortgage company will transfer the funds you have borrowed to the people you buy from - or their mortgage company)
as for exchange, this happens at a mutually agreed point with everyone in the chain. Don't exchange on a purchase without exchanging on a sale, as before exchange people can pull out of the chain, after exchange this gets very expensive and messy so generally people don't do it.
You should insure the property after exchange yes, but no, you cant move in until completion. (you can exchange and complete on the same day if everyone in the chain is happy with it. We did but I wouldn't recommend it personally!)