Two strikes set for February.
Union leader Len McClusky has warned of the possibility of major strikes during this summer's games.
Teachers and government workers are forming picket lines, plus a march through central London.
The management at tube union Aslef have described the chances of a strike on the day of the Royal Wedding as "remote".
The RMT, those loveable rogues partly responsible for many of London's Tube strikes, are offering special Christmas cards on their website. The perfect gift, perhaps?
Londonist
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