LONDON is set to be paralysed by its second Tube strike in a month after drivers slammed “pig-headed” Mayor Boris Johnson for refusing to postpone all-night services to find a settlement.

Drivers’ union Aslef and engineers and power staff in Unite said yesterday that they had rejected a new pay deal.

The two unions are due to strike alongside white-collar union TSSA and the blue-collar RMT for 24 hours from 9.30pm tomorrow.