" ... evidence to the effect that the other person— (a)has committed an offence (whether a different offence from the one with which the defendant is charged or the same one), or (b)has behaved, or is disposed to behave, in a reprehensible way ... "
"It is one thing for the applicant to deny that he had acted as alleged, but it is another thing entirely to suggest that the whole allegation against him is a deliberate and elaborate concoction on the part of the principal witness."