I don't agree as i think "Caving regions of the UK and Eire" is too long
eg (worst case)
Caving regions of the UK and Eire\Peak District\Castleton catchment area\Suicide Cave (aka Horseshoe cave)
or
Caving regions\Peak District\Castleton\Suicide
I think I prefer the abbreviated form. It'll detract from the main content of the page if it becomes too big. We can rethink if someone does create a "Regions" page!