Hi Alan, try tightening/aligning the contacts to the tilt/telescopic control box
a grey plastic box in the footwell.
I recently had a fault fixed with my steering column tilt, it also cured the seat belt height control,which had not been working.
therefore ? this box also controls the memory seats and seat belt height?
worth a try, if you do this it can take a few hours to take effect, mine went intermitent for
a while, before working perfectly .... no idea why?
hope this helps
Rich.