Derek Colclough Walker-Smith(MC 23-28) was a British Conservative Party politician.
On leaving Rossall, he attended Christ Church, Oxford. He then went on to become a barrister, called to the bar by Middle Temple in 1934. He was vice-chairman of the Inns of Court Conservative and Unionist Society and was made Queen’s Counsel in 1955.
He was the Member of Parliament for Hertford from 1945 to 1955 and East Hertfordshire from 1955 to 1983. He was vice-chair of the 1922 Committee between 1951 and 55 and held ministerial positions including Economic Secretary to the Treasury (1956–57) at the Board of Trade(1955–56 and 1957), and Health (1957–59).
Derek was created Baronet of Broxbourne in the County of Hertford in 1960. On 21st September 1983, he was elevated to a life peerage as Baron Broxbourne.