In 1940 he was a Common Councillor of the City of London. In 1945 he was an Alderman and Justice of the Peace for the City of London. He was the Visiting Magistrate of Holloway Prison from 1945 to 1955. He served for a year as a Sheriff of the City of London in 1949-50 and as Lord Mayor of London in 1955-56.  He was created a Baronet 'of Dewsbury' on 8 May 1956.
In 1956 the University of Leeds awarded him an honorary Doctoral Decree of Law. He was Deputy Lieutenant of Kent (1962) and High Sheriff of Kent for 1964-65. From 1964 to 1967 Sir Cuthbert was the Governor of the Irish Society. He was also a Fellow of the Royal Society of Arts.
He married Joyce Wallace Whyte, daughter of Robert Whyte, on 14 June 1927, and had two children:
- John Robert Whyte Ackroyd, 2nd Baronet (1932–1995)
- Christopher Lovell Ackroyd (born 1934)
On his death in 1973 he was succeeded in the baronetage by his eldest son.
- Cuthbert Ackroyd thePeerage.com
- ‘ACKROYD, Sir Cuthbert (Lowell)’, Who Was Who, A & C Black, 1920–2007; online edn, Oxford University Press, Dec 2007
Sir Seymour Howard, 1st Baronet
| Lord Mayor of London
Sir Cullum Welch, 1st Baronet
|Baronetage of the United Kingdom|
| Baronet Ackroyd
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