Caplin, described as being from the
centrist wing of the Labour Party, was elected as Member of Parliament for Hove in 1997, He became
Parliamentary private secretary to
Margaret Beckett in 1998. Following re-election in 2001 Caplin became an assistant government
whip. He was a prominent supporter of the
2003 invasion of Iraq, and refused to accept a 1,000 signature petition from constituents against the invasion, resulting in regular demonstrations outside his constituency office. In June 2003 he was appointed
Parliamentary under-secretary of state and Minister for Veterans at the
Ministry of Defence. During his term, he introduced the
Veteran's Badge for those who had served in HM armed forces. He was vice chairman of
Labour Friends of Israel from 1997 to 2005. Caplin appealed, stating that Legg's letters had gone to an old address and had not been forwarded. On 1 April 2011 his appeal was upheld and the amount of repayment reduced to £1,178.43 (which Caplin had overclaimed due to interest rate fluctuations of which he was unaware); Caplin accepted the finding and agreed to repay the money. ==Post parliamentary career==