Hang on, I think you're making a big mistake - one of those regions is landlocked. I propose we fix this by adding a narrow corridor to the top right.

This will provide vital sea access and cause no other problems I can think of.

In case of interest - I used your list to create some labelers which tag MPs with their party, constituency and parliamentary. Thanks for putting the list together.
@roles.mplabeller.uk
@constituencies.mplabeller.uk
@parties.mplabeller.uk

Just made for fun really, but hopefully of some use.