It has been on the go for a while actually, this one. FBHVC carried out a survey at the beginning of the year to test owners views and came out with a majority in favour. Since then though, some of the classic car press have been trying to stir up opinion against the decision, even though in many of the mainstream publications (and hence presumably their readership), their focus, by and large, is on much later cars.
The current MOT process is getting far too onerous for pre 60's cars, there aren't enough around to justify a two tier system and this measure, I think, aligns us with other countries in the EU.