John Charles Baron (born 21 June 1959) is a BritishConservativepolitician and the Member of Parliament for Basildon and Billericay since 2001. Baron has in relative terms frequently rebelled against his party, specifically in his calling for a sooner referendum on the European Union and in opposing military intervention in Iraq, Libya and Syria.
On 3 January 1988, he transferred to the Regular Army Reserve of Officers. This signalled the end of his military career but he remained liable to call up. He resigned his commission on 1 June 1997.