Updated for the new boundaries. If there are any errors you can see, let me know
Old parliamentary county, preserved county (Wales) and defunct region (Scotland) boundaries, where a seat crosses them are shown in '......'
I did this for as a good visual tool to familiarise yourself with geography in an otherwise cluttered map.
Opening the image in a new tab should give you a 'Paint' editable image.
EDIT: Amended.
Out of interest was this labeled with names? The image in the post isn't loading for me but the version in your gallery doesn't have labels.