What actually happens between signing and keys
Four dates, in order, and each one has a consequence if it slips.
Once the contract is signed you are in the conditional period. The cooling-off period runs first, usually five business days from when you get the signed copy, and terminating in it costs a penalty of 0.25 percent of the price.
Then the finance date, where your lender's unconditional approval has to be in and your solicitor has to give notice, because the bank saying yes does not satisfy the contract on its own. Then building and pest, where a report you are not satisfied with lets you terminate without penalty.
Then settlement, where the money moves and the title transfers. Miss a date without asking for an extension and you can lose the right, or the deposit.