Sir Thomas Edward Gubbins Lucas, 5th Bt.1
He was educated at Wellington College, Crowthorne, Berkshire, EnglandG.1 He graduated from Trinity Hall, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Master of Arts (M.A.)1 He was technical director of Vacuum Research (Cambridge) Ltd between 1959 and 1962.1 He was founder of the Engineering Capacity Exchange London in 1963.1 He was registered as a Chartered Engineer (C.Eng.)1 He was technical director of Bourdon Tools between 1973 and 1982.1 He was an engineer and research analyst.1 He was a director of SGF Properties plc.1 He succeeded as the 5th Baronet Lucas, of Ashtead Park, co. Surrey [U.K., 1887] on 2 May 1980.1 He was appointed Fellow, Royal Society of Arts (F.R.S.A.)1 He was appointed Fellow, Briitsh Institute of Management (F.B.I.M.)1 He lived in 2003 at Shermans Hall, Dedham, Essex, EnglandG.1
Child of Sir Thomas Edward Gubbins Lucas, 5th Bt. and Charmian Margaret Powell
- Stephen Ralph James Lucas+2 b. 11 Dec 1963
Lt.-Col. James Stanley Powell1
Child of Lt.-Col. James Stanley Powell
- Charmian Margaret Powell+2 d. 6 Oct 1970
Charmian Margaret Powell1 
From 1958, her married name became Lucas.
Child of Charmian Margaret Powell and Sir Thomas Edward Gubbins Lucas, 5th Bt.
- Stephen Ralph James Lucas+2 b. 11 Dec 1963
Stephen Ralph James Lucas1
He was educated at Wellington College, Crowthorne, Berkshire, EnglandG.1 He graduated from Edinburgh University, Edinburgh, Midlothian, ScotlandG, with a Bachellor of Commerce (B.Com.)1
Children of Stephen Ralph James Lucas and Charlotte Johnson
- Olivia May Lucas2 b. 1997
- Samuel Edward James Lucas2 b. 19 Aug 1999
Charlotte Johnson1
From 1993, her married name became Lucas.
Children of Charlotte Johnson and Stephen Ralph James Lucas
- Olivia May Lucas2 b. 1997
- Samuel Edward James Lucas2 b. 19 Aug 1999
Samuel Edward James Lucas1,2
- [S37] BP2003 volume 2, page 2424. See link for full details for this source. Hereinafter cited as. [S37]
- [S6590] Stephen Lucas, “re: Lucas Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 25 February 2013. Hereinafter cited as “re: Lucas Family.”
- [S37] BP2003. [S37]
Olivia May Lucas1
James Jonathan Hughes Delight Lucas1 
He had three other sons and three daughters.1 He lived at Lowestoft, Suffolk, EnglandG.1
Children of James Jonathan Hughes Delight Lucas and Elizabeth Pearman
- Charles Thomas Lucas2 b. 26 Oct 1820, d. 4 Dec 1895
- Sir Thomas Lucas, 1st Bt.+2 b. 18 Jul 1822, d. 6 Mar 1902
Thomas Pearman1
Child of Thomas Pearman
- Elizabeth Pearman+2 d. 26 Jan 1865