Thank you for your question
My name is ***** ***** I am sorry for your loss
I shall do my best to help you but I need some further information first
When were the Wills made?
Just for clarity - to the best of your knowledge and belief the Originals were left with the solicitor?
In fact the firm was subject to an Intervention by the Solicitors Regulation Authority - details here
I suggest that you contact Blake Morgan who may have the originals.
Are any of the assets held in your mother's sole name?
Is the £23,000 in the account?
In that case it is likely that you will need to obtain Probate in Order to release those funds.
You can arrange an appointment at your local Probate Office if you wish to do it in person
Please ask if you need further details
That is good news - it is fair to say that the major banks are better than they used to be at this - only a few years ago the limit for doing this was £5,000!
If that works then that is great - and you should be able to deal with the Land Registry by sending a copy of the Death Certificate