chopper2004 - I think demos means potential buyers getting demo flights. Heli UK Expo is for people who already know what helicopters can do, so there's no need for some fancy scenario for Joe Public like RIAT was.
In association with HCGB, Heli UK Expo will host an Air Challenge Qualifying Round and Finals over two days too. Info
here
Lots of Cabris due - figure of five quoted somewhere out of the seven in the UK so far (there's a further 8 on order of this new type too)
HQ Aviation has an
impressive line up too
Heliair have
the first R66 on an EASA registration
Sloane have a variety of aircraft too
and more, I'm sure...