We used to have coal in England...now we get it from abroad.
In an ideal World a law would be passed were NO guns were allowed and all those out there destroyed, trouble is the law makers are not going to take a risk of trying to pass that without making sure they are armed first.
We used to mine coal in England until Thatcher used the miners strike to break the power of the unions.
Since then it has never been cost effective to pay the high wages that dangerous jobs dictate in the UK, so we buy it from Russia/Poland where they can mine it in huge open cast mines at minimal cost.
It seems there will never be a time when it is cost effective to access those huge deposits of native coal - especially when Wind and Wave start to undercut the cost of all fossil fuels.