Image source, PA Media

We're now getting pictures from Folkestone, Kent, where queues for car passengers hoping to cross the Eurotunnel are backing up.

As a reminder, LeShuttle - which runs services for passengers and their vehicles through the Channel Tunnel - has warned of major disruption.

Eurostar, which runs from central London and is just for passengers, has cancelled all its services.

Image source, PA Media

We've just seen an update from train company LNER.

It says that "any customers who have had to abandon their journey in London King's Cross are able to return to their home station on the next available LNER service at no additional cost".

LNER customers who choose to defer their Eurostar travel to a different day may use their existing LNER ticket to travel on that same day, it adds.

Image source, Reuters

A spokesperson for the Port of Dover has just confirmed to the BBC that ferry operators running between Dover and Calais have capacity for extra passengers looking for alternative routes.

LeShuttle departures from Calais to Folkestone are now subject to three-hour delays, up from two hours.

Trains travelling in the other direction are still facing delays of approximately three-and-a-half hours.

As a reminder, LeShuttle provides train services for people and their vehicles through the Channel Tunnel.

It is separate from the Eurostar, which is just for passengers.

Alex Emery
BBC News

Image source, Steph Roberts

"We’ve not had any updates, or been given any food or water," says Steph Roberts, who has been stuck at the Calais terminal of LeShuttle with her husband Robert and their bulldog Dempsey since 10:30 local time.

She has spent two weeks in France seeing her parents and family over Christmas and is now trying to get back to her home in Ashford, Kent.

"We’ve just been spending the time going through social media and reading magazines," she says.

"I’ve also gone out to take the dog for a couple of walks."

Nicky Shiller
Reporting from St Pancras

​I have just arrived at St Pancras to hear an announcement in both English and French informing passengers that all services have been cancelled for today.

Staff are advising passengers to rebook for another day.

The atmosphere is calm and the number of people is thinning out slightly as people realise they are not going to be able to travel today.

Meanwhile, the AFP news agency also reports that all services have been suspended between London, Paris, Amsterdam and Brussels.

Stay with us for further updates.

Kelly North and Bethany Massey-Chase are at St Pancras and have had train to Paris cancelled, due to what staff described to them as "a blocking in the tunnel".

"They've just said all services are cancelled," says Kelly - this is despite some services still listed as running on the Eurostar website.

The pair add that they weren't told "anything specific about times", Bethany says, just that "everyone with a booking today needs to move it".

"People are still waiting here. I think they're still expecting that they'll get on, but there's nothing happening," says Kelly.

Bethany adds that they've "been lucky and scored one [a train] for tomorrow, but we've had to get on really quick because they're all booking out" she adds.

"Everyone's a bit stressed, they're all asking for help," says Kelly.

Bethany adds that younger passengers have been helping out less technologically-confident travellers with navigating re-booking their trains online: "All the youngies are stepping in and helping out."

We've just been sent these images from St Pancras International Station - the Eurostar terminal in London.

Large crowds of people are waiting near the departures area, after the operator warned of major disruption and urged passengers to postpone their journeys.

Some upcoming services between London St Pancras and Paris Gare du Nord are marked as cancelled on the Eurostar website.

This includes the 14:31GMT, 15:31 and 20:01.

There are also cancelled services going the other direction - between Paris Gare du Nord and London St Pancras. These include the 15:12, 17:12, 20:12 and the 21:12.

As a reminder, Eurostar has urged passengers not to travel today - so this may not be the end of the cancellations.

Image source, Eurostar

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Delays are being reported on both LeShuttle terminals - that's the service that takes road vehicles on trains across the Channel.

On the UK side, there is a delay of around three-and-a-half hours to the booked time.

On the French side, the delay is currently around two hours.

Passengers travelling from both terminals are urged to check in as planned.

As a reminder, Eurostar earlier said a Le Shuttle service had "failed" because of the Channel Tunnel power supply problem.

We also have a statement from National Rail, which urges passengers to postpone their journeys to a different date.

National Rail says the power problem is likely to lead to severe delays and last-minute cancellations between London St Pancras International and Paris Nord.

"There is a problem with the overhead power supply in the Channel Tunnel," it says.

"Trains are likely to be subject to severe delays and last-minute cancellations.

"Check before you travel as your journey could be disrupted. We strongly advise all passengers to postpone their journey to a different date."

Eurostar is telling travellers to postpone their journeys due to a problem with the overhead power supply.

The following statement has just been posted on its website:

Due to a problem with the overhead power supply in the Channel Tunnel and a subsequent failed Le Shuttle train, we strongly advise all our passengers to postpone their journey to a different date.

Please don't come to the station unless you already have a ticket to travel. We regret that trains that can run are subject to severe delays and last-minute cancellations.

Please check for live updates on the status of your train on the Train status and timetables page.

We'll bring you more on this shortly. Stay with us.