It is "a significant alteration".
The hon. and learned Member also referred to borderline cases. I remind him that I said that the Registrar was prepared to discuss informally the position of agreements. I did not suggest that he would do anything more than that, and I can say that he will do this only where there is a genuine issue about registrability on the part of the parties. He fully recognises, as does the Board of Trade, that the High Court is the last resort. There is no question of any discretion being exercised by the Registrar. I hope that I have been able to reassure the hon. and learned Member, at least on this point, if not so well on all the other points.