Below are some links you may find useful

  Oxford Croquet Comprehensive coverage of the rules of Association Croquet as well as helping to source equipment
  Croquet Association Governing body for croquet in England, Wales & Channel Islands
  Croquet in the North West Information about Clubs, Leagues and more.
  World Croquet Federation Includes information on all variants of croquet
   not forgetting our hosts . . .   
   Levens Hall  For further details of the House and Gardens