We do engage in dialogue with individual cachers on TC, and as it happens both of my own sponsors there are members of GAGB. But trying to contact every individual UK Terracacher would of course be a hopeless task, and forum posts are no solution because of course so many cachers don't use the forums.
What we'd like to see is some recognition from TC that at least some landowners require permission to be sought before caches are placed on their land, and that there are blanket agreements with many landowners which have conditions that the landowners require to be met. That recognition can of course only come from the top, and unfortunately the top remains silent.
That said, I would welcome suggestions as to how UK TC cachers could be brought under GAGB's umbrella.
Do not go gentle into that good night.
Rage, rage against the dying of the light. (Dylan Thomas)