Hands up if you’re looking for some free family activities over the summer holidays? We thought so…how about a spot of trig bagging to get the family outside? This year we’ve been celebrating the 80th anniversary of the trig pillar, those concrete pillars that are often found at the top of hills and create a handy photo opportunity.
Once a key part of our surveying network, and since superseded by GNSS, they stand tall and mark the summit of many a walk. With around 6,000 still standing around Britain you stand a fair chance of spotting one when you’re out exploring, and you can spot them on your map as the small blue triangle with a dot in the centre.