Here is the info on the green one from Redhill, G-SIVR
http://www.aeroboek.nl/900/00102.HTM
...and the Stobart Explorer
http://www.aeroboek.nl/900/00010.HTM which was also used in James Bond
ie Another Day
Also, try calling Eastern Atlantic helicopters in Shoreham, they have plenty of knowledge on the Explorer.
http://www.easternatlantic.co.uk/
....anyway, I'm off to finish my cheese and chutney sarnies and note down some more tail numbers!!