Wrong !

it is in Lancashire

Up there is the "Centre of the British Isles"
- in 1991 the Ordnance Survey officially declared it so.

The first location was a site at Cromwell's Bridge, Chaigley which is a couple of miles due west of Clitheroe in Lancashire.

It was then found that the calculations failed to include all the islands around Britain and the centre was finally pinpointed ten miles (16km) further north at a point near Whitendale Rocks.
The British National Grid reference for the rocks is SD 644 565.

Good old British Telecom sited their hundred thousandth payphone at Dunsop Bridge, the nearest village to the centre of Britain.
A fact
brought to you by ...
Clanvis