This was the final step of cancelling heavy criticized national photo ID card program. Large number of hard disk and backup tapes holding personal data of applicants have been destroyed. The idea of national ID card emerged on the wave of post 9/11 legislature to enforce security and became law in 2006. New law faced heavy criticism from civil liberty rights supporters. Conservative party made cancelling the bill one of its election promises. After winning the elections in 2010 prime minister David Cameron announced program to be cancelled as too expensive and threatening citizen liberties.
Damian Green, immigration minister interview on destroying database: http://www.youtube.com/watch?feature=player_embedded&v=2dB-LQf6zYU