The strike is part of a two-year campaign of action to secure £4,000 in London weighting for local government staff in 32 London boroughs. The current London weighting allowance is between £1,500 and £2,850.
'The strike will take place on the same day as talks with the employers. It is our intention to demonstrate to them the strength of feeling among low paid local government workers who are being squeezed out of the capital by high living costs.
'Our recent ballot showed growing support among members for this action. It is time the employers take a reality check and realise this dispute is not going to go away.'