That's odd: I posted a response to Terence which has not appeared, but the forum's '## messages found' has one more than are visible. Perhaps it will turn up ...
I had written that to the best of my knowledge the 'One Dance' Diplomas don't confer 'Full Membership', but 'Ordinary Membership'. I'm not sure what the difference is, but it may relate to restricted voting rights (?), but certainly restricts members to entering examination candidates only in the branch in which the qualification is held.
Holders of a 'core' qualification can enter candidates for any style. But can anything that accounts for 0.6% of the association's revenue (exam fees, mostly) REALLY be called 'core' within the normal meaning of the word.
And I say again, that I am not attacking sequence dancing. Judging by some of the sequence forums, it is quite clear that they are happy to attack each other, and need no help from me. But 'Classical Sequence' as it is defined by the Association is a very small (almost insignificant) part of the sequence dance world.
While sequence dancing dominates social dancing in the UK (and elsewhere), this is modern sequence. If you see a Fylde Waltz, or any of the others at a general social dance, it is a rarety, and there will only be one or two couples on the floor, whereas if you announce most well known or recent sequences, you'll be crushed under the rush to the floor.