David Barclay Williamson

Grenadier Estates Ltd. operates as property development, investment and asset management company. The company was founded in 2005 and is headquartered in Exeter, the United Kingdom.

Low Carbon Ltd. invests in the energy sector and produces renewable energy. The firm specializes in infrastructure investments in listed and unlisted companies. It prefers investing in renewable energy power projects with a focus on solar photovoltaic, concentrated solar power, onshore wind, and tide and anaerobic digestion technologies. The company was founded by Roy Bedlow and John Cole in 2011 and is headquartered in London, the United Kingdom.

Oxygen House Group Ltd. provides investment services in improving educational. The private company is based in Exeter, UK and has subsidiaries in the UK and the United States. It was founded in 2012.

Low Carbon Oxygen Ltd. is an investment holding British company founded in 2015. The private company is based in Exeter, UK. and has subsidiaries in United Kingdom.

Part of Oxygen House Group Ltd., St Margaret's Residences (Exeter) Ltd. is a leading independent property agent and acquisition specialist based in Exeter, UK. St Margaret's Residences offers free, no-obligation valuations and is known for its expertise in the South West region. The British company was founded in 2013.