I think you worry too much Cocconut.
The CAA aren't daft, and very safety
concious. If there is any truth in this rumour, then I'm sure that they will be selecting highly qualified PPL pilots of which there are plenty in the Gliding world. Moreover, who better to instruct and check tug-pilots than glider pilots. It is a different art tugging gliders aloft.
When I used to glide I've had the misfortune to be dragged aloft by fully competent pilots who just didn't appreciate the requirements of the unfortunate behind, hanging on and gritting the teeth.:-)