According to a draft European Commission regulation, seen by The Daily Telegraph, the new millimetre wave imaging scanners are to be used “individually or in combination, as a primary or secondary means and under defined conditions” to provide a “virtual strip search” of travellers. Dominic Grieve, Shadow Home Secretary, stressed that while body scanners may be an effective security tool “the implementation must be carried out by the British government in a proportionate manner, based on UK security requirements rather than the dictates of Brussels”. The new imaging technology creates an image of an unclothed body which privacy critics argue “amounts to a virtual strip search” has been tested on a voluntary basis at Heathrow’s Terminal Four.