They would mostly be classed as microlights in the UK (the full scale look like they just tip over into the VLA category), but so far as I can see the dream classic is the only one that would qualify under the proposed 115kg de-regulated category.
Any of the others you'd have to put through either BMAA or PFA for design approval and no doubt would suffer a few mandated design changes, but it would be fun to do. If anybody is seriously thinking of doing so, certifying light aeroplanes is something I'm quite good at, and I might be persuaded to help out for an appropriate consideration in flying hours.
They should all be flyable on a PPL + microlight differences. (The light aeroplane, I think I'd still do the microlight differences training - it's probably the best way to learn about the combination of high drag and low intertia that you'll get on an aircraft that shape and size).
G