There are a fair few universities in the UK that have gliding clubs; Bath, Edinburgh, Loughborough, Nottingham, Oxford, Cambridge, UCL and ICL are the ones I have met members of. However all of these operate as university social/sports clubs so they don't or can't employ their own instructors. All of these clubs also operate as 'surrogate' clubs associated with other civilian/military gliding clubs, therefore the instruction is generally provided by the parent club's own instructors. Students who do have an instructor rating do also instruct but I have never come across one who has been paid to do so.