OP, I've just sold my late in-law's house as the sole executor. I'm a solicitor, but not acting as a professional executor here. Had I wished, I could have trousered it all. Everything came to me, be it cash in the bank, the post-office, or the proceeds from sale of the house. That's the point. As sole executor with a grant of probate, I have sole authority to receive the funds. Yes, I'm supposed to distribute them according to the will, but no-one is checking that other than the beneficiaries (my husband and my two SILs ;-) ). The one exception is a life insurance policy, which doesn't form part of the estate and, as such, is distributed at the discretion of the trustees, usually in accordance with any expression of wishes.
That's not to say you are without remedies here. If there's a surplus, that's half yours.
The land registry didn't use to name the transferor (unless inadvertently when reciting a conveyance that contained covenants etc to be noted), but rather the new registered owner (along with the charges register, price paid and some restrictions). Has it changed now the new system has been implemented? Hope you got value for that £3!
(to be clear, I haven't deducted a single solitary penny when distributing proceeds to the beneficiaries and I was only momentarily tempted when DH was being an arse...)