http://news.bbc.co.uk/1/hi/england/london/10293456.stm

The Rail Maritime and Transport Union (RMT) has said its members on Docklands Light Railway (DLR) will walk out for three days on 23 June over a pay row.

RMT general secretary Bob Crow said: "Our members will not be bullied by management into taking on more work without being properly compensated."

The DLR members work for Serco, which called their demand "opportunistic".

The stoppage will coincide with a 48-hour strike called by some London Underground maintenance workers.