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- MARK RICHARDS PLANT HIRE LTD- 04988926 - Incorporated on 9 December 2003 
- MARK RICHARDS TELECOMS LTDDisolved- 08339321 - Dissolved on 17 January 2023 
- MR MR LTDActive - Proposal to Strike off- 15533685 - Incorporated on 1 March 2024 
- CALVERT & DANBY LIMITED- 02175012 - Incorporated on 7 October 1987 
- ELLEN CALVERT LIMITED- 08166087 - Incorporated on 2 August 2012 
- CALVERT CONTRACTORS LIMITEDActive - Proposal to Strike off- 04487960 - Incorporated on 17 July 2002 
- SA CALVERT LIMITED- 05563585 - Incorporated on 14 September 2005 
- NORTHUMBRIA CALVERT TRUST- 01596913 - Incorporated on 10 November 1981 
- CALVERT CONTRACTING LTD- 09053450 - Incorporated on 22 May 2014 
- CALVERT SOLICITORS LLP- OC382424 - Incorporated on 13 February 2013 
- HANAMI (CALVERT) LTD- 09294588 - Incorporated on 4 November 2014 
- CALVERT ROOFING LTDDisolved- 12655425 - Dissolved on 16 November 2021 
- ARNOLD & CALVERT LIMITED- 13411221 - Incorporated on 20 May 2021 
- CALVERT & BORTOLI LTDActive - Proposal to Strike off- 10011115 - Incorporated on 17 February 2016 
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- MR RICHARD DAVID TONY JACKSON LIMITEDDisolved- 14605452 - Dissolved on 25 June 2024