Out of 5000 tube drivers – 600 vote and only 299 in favour of going on strike over a sacked colleague caught with alcohol in his breath. When you threaten action you need a strong alternative position writes the Negotiating Speaker –

Drivers on London Underground have voted to strike over the sacking of a colleague.
Members of the Rail, Maritime and Transport union backed industrial action by 299 votes to 221.
General secretary Mick Cash said: “Our members have voted for industrial action and the union will now consult extensively with our representatives before deciding on our next moves in this dispute.

“The union remains available for talks, at Acas if necessary, and as we have already stated we are ready to abide by any decision made at an Employment Tribunal and cannot understand London Underground’s reluctance to agree to that course of action.”
LU had urged union members to vote against strikes, insisting they had dismissed the Northern Line driver for failing two random breath alcohol tests, adding that it operates a zero tolerance policy for drugs and alcohol