Recommendation for a precautionary forced landing was, if possible, to choose a field close to a pub.
Still taught in glider training. Size, shape, slope, surface, approach, livestock/crops, pub.
Of course, forced landings are a bit more common there. And it might take a few hours for your mate to arrive with the glider trailer, vs. only a few minutes for the local police/fire brigade in case of an emergency with a powered aircraft.