The appeal is allowed in varied form. For a period of three years from the date of this decision, the planning obligation, dated 16 April 2012, made unilaterally by John Albert Ashworth and Anne Mary Frith, John Albert Ashworth and Elaine Rosina Ashworth, Anne Mary Frith and David Albert Frith and Kensington Developments Limited to Blackpool Borough Council shall have effect subject to the modifications as set out in the Schedule appended to this decision.