Enforcing a Mesher agreement through the Courts

As part of my divorce many years ago, a Mesher Agreement was signed between myself and my ex. The trigger points in this Agreement have been reached and I've written to my ex twice asking her to release my share in the former marital home. She has failed to respond and the house is still not up for sale. I did include a line in my letter advising if she did not respond and I had to start enforcement proceedings, I would pass on the costs to her. Does anybody know the process to begin enforcement please? Legal costs when I got divorced topped £35K as my ex is a very difficult person so I am looking to do as much myself to keep costs down. Any tips or information would be gratefully received.

A D11 form, send with a short statement of what you are requesting, a copy of the original order and copies of the two letters you have sent to your ex.

You need to send three copies of everything and a cheque. I’ve only ever paid £50.00 but I believe some others have paid £155.00.