On holiday in Monmouthshire dragged the family off to find a local trig pillar, TP6137. This was an easy find with nice views.
Not so good was trying to find TP2148 which was hidden in brambles on the top of the wooded hill. Humph. I would have investigated further but (a) the kids weren't in suitable shoes and (b) I had left my machete at home. Next time eh?