London Underground today said there was no justification for strike action announced by the RMT and ASLEF unions.

It is unreasonable to call strikes while consultation is taking place

Responding to the unions' threat of strikes by Tube drivers on 21 February and 2 March, a London Underground spokesperson said: "There is no justification for strike action.

"London Underground is not imposing anything on Tube staff. The fact is that we launched a consultation with all our trade unions on new harassment, discipline and attendance procedures before Christmas. That consultation continues.

"It is unreasonable to call strikes while consultation is taking place on these issues. We hope that both unions will continue with talks to sort out these matters through discussion and consultation."