you are asserting that they are not being mined due to physical constraints. That is a positive assertion,

WTF does "not" mean? Hey, is that a negative? "irreversible" is also a negative. You ARE asking me to prove a negative, so don't lie.

Anyway, I am not arguing there is no longer coal down there, nor am asserting there are physical limits. Those are YOUR strawmen, so another lie.

[you claim] that UK coal production is low for geological and EROEI reasons rather than for political or economic reasons.

I agree! It is for economic reasons. The "political" decision that was made was to stop subsidising a loss-making industry. QED.

If you think that the economic or political stance will change in the future, it is up to you to provide evidence for that.

Thanks for poking your nose in, but your objections are not even semi-coherent!