This is the day all the money is dealt with. For your sale, the funds from the buyer are received by your solicitor and will typically be released the same day as long as you are providing keys to an empty property. Any mortgages or other secured debts are repaid by your solicitor with any remaining balance then transferred to you. If the buyer is paying your solicitors fees and our fees, these are normally also received. Your solicitor keeps theirs and forwards on ours. If you are buying somewhere else, the mortgage money (if any) and any savings you are putting in also need to be received by now. Any money then going to the solicitors representing whoever you are buying from is also dealt with on the same day.
With all the money being dealt with on the same day, in most circumstances you would have your removal van pack everything in the morning, hand keys to the buyer and then in the afternoon, unload everything at the new property.