Eurostar passengers could face disruption today due to a strike over "shocking working conditions".

Rail union RMT has confirmed St Pancras station staff will not return to work until 11.59pm tonight, but Eurostar says services will run as normal.

The dispute stems from alleged service failures and breakdowns, which have reportedly reduced the London terminal "to chaos".

RMT general secretary, Mick Cash, said: "The conditions at St Pancras have been simply appalling in recent weeks, as services plunge into meltdown on the cusp of the busiest part of the year.

"We will not tolerate a position where our members are left to pick up the pieces due to corporate failures.

"It is time for Eurostar to get their heads out of the sand, recognise the seriousness of the current situation and come forward with proposals that address the issues our members have been raising with them."

A spokesman for Eurostar said: "We are disappointed to hear that the RMT plans to continue with strike action on Saturday as we were keen to find a joint resolution.

"Our plan is to run a normal service so that all passengers booked to travel with Eurostar will be able to do so."

RMT will now escalate the dispute, and begin balloting train managers over the same issues.