I do like to be beside the seaside !

[Closer]

It is said that in the UK we are never more than 72 miles from the sea.....which place in the UK is the furthest from the coast. I have a feeling it's somewhere like Walsall, but someone is bound to know on here!

[Quizmonster]

Here's a quote from the Ordnance Survey's website...and they should know...
The furthermost point from the sea in the British Isles is at grid reference SK 257144.This lies just east of Church Flatts Farm, approximately 1 mile south-east of Coton in the Elms, Derbyshire.

[Peter Pedant]

How did he find that out?

It's in Derbyshire -  iodine in the soil is meant to be tied to nearness to the sea and the lack of iodine in Derbyshire soil led to Derbyshire Neck (goitre) in the days before Cerebos salt