Heathcote-Drummond-Willoughby was the second son of Gilbert Heathcote-Drummond-Willoughby, 1st Earl of Ancaster, and his wife Lady Evelyn Elizabeth, daughter of Charles Gordon, 10th Marquess of Huntly. Gilbert Heathcote-Drummond-Willoughby, 2nd Earl of Ancaster, was his elder brother. He entered Parliament for Stamford in the January 1910 general election, a seat he held until 1918 when the constituency was abolished, and then represented Rutland and Stamford from 1918 to 1922.
Heathcote-Drummond-Willoughby married Lady Florence, daughter of George Henry Conyngham, 3rd Marquess Conyngham, and widow of Bertram Frankland-Russell-Astley, in 1905. She died in January 1946. Heathcote-Drummond-Willoughby survived her by four years and died in February 1950, aged 77.
- Hansard 1803–2005: contributions in Parliament by Claud Heathcote-Drummond-Willoughby
|Parliament of the United Kingdom|
Lord John Joicey-Cecil
|Member of Parliament for Stamford
|New constituency||Member of Parliament for Rutland and Stamford
Charles Harvey Dixon
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