vulcan71 wrote:Impressive footage , where does Martin Baker do live ejections ? Is it over there own airfield or on a range ?

From Wiki.....,
The Martin-Baker company maintains its own airfield, Chalgrove Airfield, in Oxfordshire for operational testing of ejection seats. A second airfield (the former RAF Langford Lodge near Crumlin in County Antrim) is also used for testing, and houses a 6,200 feet (1,900 m) high-speed rocket sled track.
Two Gloster Meteor aircraft, WL419 and WA638, remain in service with the company as flying testbeds. Another Meteor (WA634), used in early development of ejection seats, is retained at the RAF Museum at RAF Cosford.