The song 'For a Friend', which is heard playing over the end credits was actually written for the real life Mark Ashton. It was written and performed by The Communards, whose members Jimmy Somerville and Richard Coles were both friends of Mark.
Although Mark's political affiliation was not mentioned in the film possibly to avoid alienating viewers, a communist flag can be seen hanging from his apartment wall in the opening sequence. In the movie, he also gets "commie" shouted at him when going on a stage at a gay bar.
Despite claims made in the film, many believe coal mining was certainly going to be phased out regardless of the 1984 strike. Almost twice as many coal mines closed under Labour's Harold Wilson than under Margaret Thatcher. Totaling 290 coal mines closed under Wilson, compared to 160 under Thatcher. However, the job losses under Thatcher were higher. The historical data shows that while 212,000 coal mining jobs were lost under the 1964-1970 Labour Government, under Mrs. Thatcher's 1979-1990 government, the percentage decline in jobs was actually double that. 43 per cent of mining jobs went in the 1960s under Wilson while 80 per cent were lost under Thatcher. Also, as the trend rate of economic growth was lower under Thatcher than Wilson (just 2.8 per cent compared to 3.4 per cent) and unemployment was considerably higher throughout the 1980s than the 1960s, redundant miners had fewer alternative job options as a result of Mrs Thatcher's stewardship of the industry. By the 1970s the British coal industry could no longer compete with other countries, and it was cheaper for the UK to import coal from Russia, China and Latin America.
There are cameo appearances of the real people some of the characters are based on in the Westminster Bridge scene. Reggie Blennerhassett and Ray Aller (played by Chris Overton and Joshua Hill), Gethin Roberts (played by Andrew Scott), Gethin's Mum (played by Olwen Medi), Mike Jackson (played by Joe Gilgun) and Ray Goodspeed (not directly portrayed in the movie but a leading light in LGSM)
The coal miner's strike that began in March 1984 was regarded as illegal in England and Wales, as no national ballot was taken. (A ballot by the Scottish NUM meant that the strike was legal in Scotland.)
The 1984 strike never had any chance of success, as it began in the spring and the government had decided to close coal mines anyway. The industry was no longer considered profitable, unlike during the 1973 strike.