[Kevan]

Graham 
would 3DP bodies be allowed in any class ?
or is it just hard bodies & resin moulded ?

Yes they would be allowed in the other 3 classes, as long as they are proper " to scale" modelled bodies and are of a reasonable quality 
I would probably add the words "commercially available 3d bodies" in the rules.

'Commercially available' just means anyone can buy them, I print my own to order so I guess that makes them 'commercially available'.