Richard Newbery
the contractor you employed for this work should be registered under a part P competent persons scheme as this work is notifiable to your local building control office he should issue an installation certificate to prove the installation was installed inspected and tested as per BS 7671 ,although if live cables were left exposed this could not be the case if he was registered then take it up with his governing body ie NICEIC ,Elecsa or Napit if not then trading standards is a good bet
