Helipixman, as I understood it G-BARO was owned by the Greenham group and was used to ferry managers and workmen between sites. (I used to have to clean brick dust out of it!)
Lets try:
Sorry is a poor quality photo. I think the light blue aircraft is G-AXGO which I was unreliably informed belonged to Lord Elpus. On the other hand it may have been one of the Cadbury family?
As regards the black 206 I have no idea.