Don't generalise, Keith. Those accusations definitely don't reflect how Jeremy Corbyn responds to criticism, and repeatedly urges others to do. And when did you last catch me overstepping the mark?
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The big difference with German Trades Unions is that they are allowed to get on with the job without being stomped by the government with legislation that aims to undermine their ability to do that. And it would be recognised as a breach of the constitution for any govvernment to try to do that.