IIRC if it doesn't meet the BS or ECE regs, it's not a legal a motorcycle helmet and so can't be sold as one. Anyway, have a look here:
http://www.dft.gov.uk/pgr/roads/vehi...isorsandgo4563
Quote:
All road legal motorcycle helmets sold in the UK must conform to ECE 22-05 or the older British Standard 6658 (categorised as Type A (blue label) or Type B (green label). These stickers are normally located on the back of the helmet and will also include a batch identity number. ECE 22-05 helmets are tested by BSI, and have the BSI Kitemark on the label. If it doesn't have a sticker or kitemark, don't buy it, it may be an import and will not be legal on British roads.
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From here:
http://www.motorcycle-training.f2s.com/safety.html