The picture below is from the Isle of Wight Steam railway. I took it during a visit to the railway sheds earlier this week.
For pretty obvious reasons, heritage railways rely on coal, as that is what steam trains used. The Isle of Wight Steam railway long had a choice, if it wishes to continue operating, between using coal from this country, or using imported stocks from overseas. If the UK completely abolishes any coal production, the only option is to import coal, bringing it thousands of miles by sea, and likely from countries with lower environmental and labour standards than ours.
The examples given here are Kazakhstan or Colombia.
Britain clearly needs coal mines - for energy independence, for heritage facilities like this, and as a reserve fuel whilst other alternatives are developed. The noise of campaign groups like Just Stop Oil should not drown this reality out.