Not at Middle Wallop airfield.
Despite what the "Breaking News" headline on the BBC mainpage says ("...at Army training base..."), the story itself says this:
One killed in factory explosion
One person has been killed in an explosion at a defence contractor close to the Army Air Corps training base at Middle Wallop in Hampshire.
The incident happened at Wallop Defence Systems Ltd near Andover on Monday afternoon, according to police.
Nearly 30 firefighters from Andover, Stockbridge and Winchester and Ministry of Defence fire crews are at the scene.
It is believed that an oven exploded at the facility where explosive flares are produced.