He has been closely identified with regeneration of the Harris Tweed industry in the Isle of Lewis, where he lives, and is chairman of Harris Tweed Hebrides who were named Textile Brand of the Year at the Vogue.com Scottish Fashion Awards in both 2009 and 2011 as well as UK Textile Company of the Year at the UK Fashion and Textile Awards in 2013. He is also a director of Celtic Football Club, which he has supported since childhood. Wilson wrote Celtic's official centenary history (Celtic, A Century With Honour, Collins Willow 1988) and more recently the Official History of Celtic to mark the club's 125th anniversary. Having maintained connections with Cuba, he is now chairman of Havana Energy, a UK-based company promoting renewable energy in Cuba which secured the first ever joint venture with the Cubans to build power stations fuelled by biomass from the sugar plantations. In April 2017, Wilson was present at Ciro Redondo in Cuba for the inauguration of the first of four power plants to be built by the JV, named Biopower, Havana Energy having partnered with the Shanghai Electric Company in the face of challenges presented by the US blockade of Cuba.