As above, fix your UK will to include both her names, AKA is just fine.
Also as above, the legislation preventing her from owning land if she took your name is long since rescinded.
When we moved to Thailand (long ago, there were dinosaurs roaming) Madam told me she was going to change her name (we married in the UK using her Thai married [and divorced] name). I thought she was going to change to my name, nope, she changed back to her original maiden name. No issues whatever, we have the relevant paper-trail. Thai's change their names with gay abandon and it's rarely an issue.