Interestingly, it's only relatively recently that the GB/UK adopted a nationwide time standard; be it GMT or BST.

In the 19th century it was not uncommon for towns to run on local rather than national time so, for example Worcester, being to the east of Hereford would be in advance of those living here; albeit by only a few minutes.

Apparently it used to cause all sorts of confusion, not least with railway timetables. There were also reports of criminal trials being abandoned due witnesses being given incorrect time information for their appearance.