Hi Safari
From the photos looks like the aircraft have been there at least two years, the hanger behind belongs to AKKI Aviation Services who do service, repair and recovery work (details below).
AKKI Aviation Services
Turweston Aerodrome
Biddlesden Road
Brackley, East Midlands
Tel: +44 (0) 1280 706616
Fax: +44 (0) 1280 840033
E-mail: akki@globalnet.co.uk
akki@talktalkbusiness.net
Hope this is of help Neil