If you're feeling extra adventurous, might I suggest a Devon-Cornwall alternative with a
"North Devon and Atlantic Islands" constituency with the North Devon borough + the Isles of Scilly + the Isle of Lundy (the 1 December 2015 electorate breakdown of Clovelly Bay (total 1224) was 21 Lundy, 1203 mainland) and Cornwall "proper" being divided into exactly 5 seats?
The math would be
really tight in Cornwall (the maximum allowable constituency electorate is only 62.4 electors above what the "Cornwall proper" average would be), but it might allow for a neater plan in Devon, Plymouth and Torbay (I could tell you weren't happy with some of the things you had to do there). Of course, taking away Cornwall, Scilly and North Devon (and Lundy) with 6 seats either about average size (ND&AI) or very near the upper limit might make the problem in Devon outside Plymouth worse, unless it somehow allowed you to make the two seats entirely in Plymouth smaller so you had more flexibility in the rest of Devon. If necessary, you could allow part of North Devon to be in another constituency so you're spreading the electorate shortage from the ideal over one more constituency.