He was educated at St Edward's School, Oxford, and served with the 4th Queen's Own Hussars in Italy and Germany during World War II, from 1943 to 1945.
He was selected to fight Blackpool North at the by-election in March 1962, resulting from the ennoblement of the sitting Conservative MP, Toby Low, as Baron Aldington.
Two days later, Eric Lubbock won the Orpington by-election for the Liberals, overturning a Conservative majority of over 14,000 with a swing of almost 22%.
Miscampbell became a strong advocate for the interests of his seaside resort constituents, securing tax concessions for hotels and owners of holiday flats.
He supported Harold Macmillan's proposal for the UK to join the Common Market, and was one of few Conservative MPs to vote in favour of the abolition of capital punishment in December 1964.
Margaret Thatcher recommended his appointment to a knighthood, which he declined reportedly because he thought it would prevent him enjoying his retirement from political activity.