At the by-election the following year, after Astor succeeded to a peerage, he contested the seat again but was again defeated. In his final try for Parliament, in 1955, he narrowly lost the new seat of Eastleigh to the Conservatives.
In the subsequent by-election, after Astor was elevated to a peerage, he contested the seat again but was defeated once more. In his final attempt to enter Parliament in 1955, he narrowly lost the newly created seat of Eastleigh to the Conservatives.