Erase CCTV Tape ?
A brief guide on how and why erase CCTV tapes

CCTV or Closed Circuit Television is now very widely used, for the protection of the general public and property. CCTV and Security Cameras are used by both public organisations such as the Police and Councils and private organisations from banks to building firms for security purposes. CCTV has now started to be installed on public transport, from trains and buses and even taxis.

Under new rules and guidelines relating to the use of CCTV video recordings being submissable as evidence, state that it must be proven that a video tape has been completely erased before being reused if it is to be submitted as evidence.
UK Govenment CCTV Code of Practice - PDF format

The quickest and most convenient way to erase a CCTV recording on a tape is by using a bulk tape eraser. Bulk erasing a CCTV tape can take just 5 seconds, returning the tape back to its original condition, completely clear of any previous recordings. This also ensure the CCTV tape provides the best recording quality.

It is essential that a CCTV video recording is of the best quality if it is to be used for recognition or evidence purposes. Reusing CCTV tapes without proper erasing will result in poor quality reproduction on playback.
Bulk CCTV tape erasing will also ensure conformity with the latest Data Protection laws being introduced throughout Europe.

The use of eraser is recommended by the CCTV Advisory Service for all of the above reasons:
http://www.cctv-information.co.uk
http://www.grampian.police.uk