Thanks all, very much appreciated feedback. Yes paddyboy, that is indeed a Mirage IV- it had performed a JATO take off (the display line/runway was miles from the crowd

) and then landed and was promptly shoe-horned into a HAS designed for a much smaller variant of a Dasault delta! I never understood the French AF's secrecy over such an obsolete, fairly poor, ageing Recce platform until it was retired?!