This is the trig point sitting on top of Lamb Hill (511m) on on the border ridge in the Cheviots.
To bag the Lamb Hill trig point, start by parking at Buckham's Bridge where there is a enough space for a few cars. Then follow the road back east, then the fingerpost towards Yearning Law to the border ridge.
It's around 5km to get there.
As you pass Yearning Law, make a little detour to see Yearning Hall.
Just follow this map, or find it on OS Maps.