"Trades Unions (which are for more democratically organised and answerable to their membership that any political body is)"

Ludicrous statement - Just take a look at how many of UNITE's 1.5 million members voted in the last leadership election and the one before that - Round about 10% turnout.

Coal:
Since 1947 something like 955 pits have been closed by the time Thatcher became Prime Minister 767 mines of the 955 had already been closed.
Thatcher closed 115, Harold Wilson had closed 253

Steel:
In 1947 when the industry was nationalised there were 96 steel firms in the UK.
By 1970 BSC consists of only 21 plants
By 1980 BSC has only 5 sites. The year started with a 13 week strike.

The industries you talk about Jim were already in terminal decline long before Thatcher came along. Fact of the matter now is that we cannot produce coal economically and today nobody wants to buy it. We cannot make steel economically as we simply cannot compete with China. If Corbyn wishes to resurrect these industries then we will be onto a hiding to nothing in situation that can only result in costly failure - Labour's stock in trade.