In my opinion, there is nothing wrong with the original posting.
If I was in the UK this summer with nothing better to do (i.e retired), with 400 gliding hours and 900 tows to date, I would leap at the opportunity.
Flying a tow plane efficiently is immensely rewarding and with six landings or so an hour, it sharpens up your stick and rudder skills, not to mention airmanship and lookout.
There is nothing more satisfying than flying through a thermal on the cross wind leg after takeoff, making an orbit and releasing the glider back into the core at 2000' and then being back on the ground three minutes later.
In some cases, with light-weight single-seaters flown by pilots I know well, I have thermalled up to release height.