- Stephen Duncan, Mr. UPTON- Born May 1970 - 4 Gareloch Avenue, Airdrie, Scotland, ML6 6SH 
- A K DUNCAN LTDDissolved- 04439595 - Dissolved on 29 December 2009 
- E.J. DUNCAN LTD- 03221200 - Incorporated on 5 July 1996 
- A K DUNCAN (2008) LTD- 06659970 - Incorporated on 30 July 2008 
- DUNCAN 121 LTDDissolved- 06768273 - Dissolved on 20 July 2010 
- IAN ROBERT FARRELL- Born March 1974 - 82B HIGH STREET, SAWSTON, CAMBRIDGE, ENGLAND, CB22 3HJ 
- ROBERT FARRELL JNR- 28 CARLETON STREET, PORTADOWN, CO. ARMAGH, UNITED KINGDOM, BT62 3EP 
- MR RICHARD DUNCAN FACER- Born April 1960 - 1 ELLESMERE ROAD, BERKHAMSTED, HERTFORDSHIRE, ENGLAND, HP4 2EX 
- Duncan Ian, Mr. DENHOLM-HAY- Born November 1954 - Tope Floor 15a King Street, Inverkeithing, Scotland, KY11 1NB 
- VELOCITY ELECTRICAL SURREY LTD- 13064923 - Incorporated on 6 December 2020 
- Nigel Duncan, Mr. JARRETT- Born December 1942 - C/O R J Surveyors Ethos, Kings Road, Sa1 Swansea Waterfront, Swansea, West Glamorgan, United Kingdom, SA1 8AS 
- Duncan Andrew, Mr. HARVEY- Born September 1980 - Sherwood House 41 Queens Road, Farnborough, England, GU14 6JP 
- Duncan Andrew, Mr. HARVEY- Born September 1980 - Kings Works Kings Road, Teddington, Middlesex, England, TW11 0QB 
- IAN ROBERT FARRELL- Born March 1974 - 47 CAMBRIDGE ROAD, MILTON, CAMBRIDGE, CAMBRIDGESHIRE, CB24 6AW 
- G S DUNCAN LTD.- SC253809 - Incorporated on 5 August 2003 
- P J DUNCAN LTDDissolved- 06332194 - Dissolved on 28 October 2014 
- G A DUNCAN LTD- SC558621 - Incorporated on 24 February 2017 
- R.J DUNCAN LTD- 11177731 - Incorporated on 30 January 2018 
- C&G DUNCAN LTD- 12970681 - Incorporated on 23 October 2020 
- T J DUNCAN LTD- 13181341 - Incorporated on 5 February 2021