A large fire has broken out at the site of a former RAF base in Oxfordshire, with witnesses reporting loud explosions and thick black smoke billowing from the site.Some 10 fire and rescue crews are tackling the blaze in Bicester, which has prompted a major response and warnings for local residents to stay indoors.

A large fire has broken out at the site of a former RAF base in Oxfordshire, with witnesses reporting loud explosions and thick black smoke billowing from the site.Some 10 fire and rescue crews are tackling the blaze in Bicester, which has prompted a major response and warnings for local residents to stay indoors.