Complex sentence: Gliding in the United Kingdom operates through 85 gliding clubs (both civilian and service) which have 2,641 gliders and 8,242 full flying members, though a further 26,000 people have gliding air-experience flights each year.
Split into simpler sentences: Gliding in the United Kingdom operates through 85 gliding clubs (both civilian and service). There are 2,641 gliders and 8,242 full flying members, though a further 26,000 people have gliding air-experience flights each year.