RoboAlbert - re your allegation concerning the A400M take-off performance, under JAR 25 at normal MTOM of 126.5T, the ac requires a balanced field length of 5500 ft at ISA+15, sea level, hard wet runway. Which would indicate that the RW at Lyneham should be long enough.
Mind you, getting an ac with a large T-tail and an overall height of 48 ft 3 in into one of those funny little hangars over there might prove difficult.........