I remember a conversation with the chap at CAA who was, I believe, responsible for formulating the decision not to allow the BD5 into the UK.
His argument seemed fairly straightforward - about 50% of all BD5s completed had suffered fatal accidents, and that wasn't something that CAA particularly wanted to buy into.
Whilst I'm not an over-fan of the nanny state, I have to say, he had a point.
G