The Common, or Eurasian, Treecreeper, as its name might suggest, creeps up trees, often oaks and others with rough bark, plucking insects and other invertebrates from the niches. I specifically said up, because they never creep down the tree, always up and when they get to the top, they will fly off down to a lower region of the same or another tree.
This one spends its time on the oaks in Rampton Spinney, I’ve counted perhaps 8 or 9 in this woods over the last couple of years in a few different places, but I’ve only ever seen a maximum of four at a time. So, it’s hard to know how many live here in total. It could be three groups of 3 or 4 or just one larger group or even some other combination.