Where is Huddersfield?

Earlier today I was accused by Beddardo of having ‘no seaside knowledge’, I defended myself by explaining that my home town of Huddersfield is probably bang in the middle of Great Britain (top to bottom and left to right) and so far from the sea that knowledge of seaside things such as crab lines was unusual. She didn’t beleave me, so I made the diagram below to prove my point. Not quite, but it’s not far off!

Map of Huddersfield in the middle of Great Britain