| Title | Liberal MP, Isle of Ely |
| Start Date | 1929-00-00 |
| End Date | 1945-00-00 |
| Notes | Politics Described by the Journal of Liberal History as "one of the Liberal Party's most colourful MPs",[5] Rothschild served as Liberal Member of Parliament for the Isle of Ely constituency from 1929 to 1945.[6] James de Rothschild 1928 His defeat by Harry Legge-Bourke in the 1945 general election was one of only a few gains by the Conservative Party that year, with his Liberal colleagues Archibald Sinclair and William Beveridge similarly losing to Tory opponents. During the Second World War he was Parliamentary Secretary to the Ministry of Supply in the Coalition Government 1940-1945. He was also a Deputy Lieutenant for the County of London and a Justice of the Peace in Buckinghamshire. |