Rail passengers are facing serious disruption caused by a combination of flooding and staff shortages.Heavy rain on Monday evening caused damage to signalling systems in London on key routes including the West Coast main line from Euston and East Midlands Railway from St Pancras.

One passenger, Alex Ainscough, tweeted: “Forced to spend an unscheduled night in Rugby last night as trains were at a complete standstill.”

Some delays and cancellations are continuing on Avanti West Coast and London Northwestern.

Passengers between London St Pancras and Luton are being told: “Although the flood water has now subsided slightly, this has caused damage to the signalling infrastructure. As a result of this, trains between these stations may be cancelled or delayed by up to 15 minutes.”

Commuters from south London into the centre of the capital are being told: “There’s a fault with the signalling system at Herne Hill, which means trains cannot run between Herne Hill and Victoria.

“Network Rail engineers are on site working to rectify the issue.”

Coronavirus cases in the United States are increasing, reducing the likelihood of an imminent move of the US from “amber” to “green” in Thursday’s review of traffic light categories.

The data analyst Tim White said: “Eleven states have seen cases increase by more than 50 per cent in the past week, and a large majority now heading up to some degree.”

The rate of new infections in seven days per 100,000 people is back above 60 for the first time since May.

South of the border, Mr White says: “Bad figures for Mexico this morning with growth of the new wave starting to grow again.

“A 70 per cent increase in new Covid-19 cases with 3,074 confirmed in the latest count; 89 more deaths.

“Mexico has a low testing rate, so real numbers likely to be much higher.”

Mexico is also on the UK’s amber list, but Mr White, who tweets as @TWMCLtd, has warned it could move to the red list.

The number of Delta variant Covid-19 cases in Turkey has risen to some 750 from 284 seven days ago and overall cases climbed 20% at the weekend compared to a week earlier, health minister Fahrettin Koca said.

Turkey eased most coronavirus-related restrictions on 1 July after daily cases tumbled from a peak above 60,000 in April to around 5,000, but Koca said new figures pointed to a rise.

“These increases have emerged more in places where the level of inoculations is low,” Koca told reporters after a cabinet meeting on Monday, noting rising cases in provinces of southeast Turkey.

He called on people to get vaccinated and said that around 61 per cent of the adult population had received at least one dose of vaccine. He has set a target level of 70 per cent by the time of the Eid al-Adha holiday next week.

Turkey is currently on the UK’s red list.

Reporting by agencies

Virgin Atlantic has pushed back the restart of a wide range of transatlantic flights to late August.

Affected departures include links from London Heathrow to Las Vegas, Orlando, San Francisco and Seattle; and from Manchester to Atlanta, Los Angeles, New York JFK and Orlando.

Affected passengers are entitled to a full cash refund, or can insist on being rebooked on alternative airlines to reach their destination.

A Virgin Atlantic spokesperson said: “We’re continually reviewing our flying programme and holiday schedules in response to the ongoing impact of Covid-19 restrictions.

“World-leading vaccination programmes in both the UK and US have created the opportunity to safely open up travel between these two low-risk countries whilst protecting public health and we urge the UK government to move the US to the UK’s ‘green list’ and for the Biden administration to repeal the 212F proclamation [banning British arrivals] for UK travellers.”

Greece is introducing extra restrictions for unvaccinated people.

From Friday until the end of August, all indoor commercial areas, including bars, are only open to fully vaccinated people.

“After a year and a half, no one can claim ignorance about the coronavirus anymore,” prime minister Kyriakos Mitsotakis said in a televised address.

“The country will not shut down again due to attitude adopted by certain people ... It’s not Greece that’s a danger, but unvaccinated Greeks.”

The new restrictions will apply nationwide, including the Greek islands and other key tourism destinations.

Greece is currently on the UK’s amber list, which from 19 July will become open to double-jabbed UK visitors.

Additional reporting by agencies

The next green list update is expected this Thursday 15 July.

A handful of European countries are expected to be added, including Germany, Italy and Poland, according to data analysts.

Read what could make the green grade this week:

Hundreds of thousands of people in France rushed to get vaccinated after the president warned that anybody who remains unjabbed will face extra restrictions as the country grapples with rising Delta cases.

Unveiling sweeping measures to combat a surge in infections, Emmanuel Macron said on Monday night that vaccination would not be compulsory for the general public for now but stressed that restrictions would focus on those who are not vaccinated.

Reporting by agencies

While the legal obligation to wear a mask in public life is being dropped from 19 July, some transport firms have made face coverings an integral part of their conditions of carriage.

It means that people will likely still need to wear masks on planes and trains after 19 July.

Here’s everything we know so far:

Certain Spanish regions are introducing curfews and restrictions on socialising to try to curb the spread of the Delta variant among the young.

Catalonia and Valencia are limiting social gatherings to 10 people, while the northern region of Asturias on Monday banned indoor bar and restaurants operations.

Fuelled by parties to mark the end of the school year and the beginning of summer, Spain’s two-week Covid-19 caseload is now over three times higher among people under 30 than the average.

Analyst Tim White also notes rising numbers in the Balearics, which are currently on the UK’s “green watchlist”.

Additional reporting by agencies

After the prime minister cited public transport as a setting where he would “expect and recommend that people wear a face covering,” there are fears that travellers will gain the impression that public transport is risky.

The Confederation of Public Transport, representing bus and coach operators, said in a statement: “We expect that many people, especially in busy places, will follow the prime minister’s call to continue to wear a face covering as a courtesy to others.

“Passengers, though, will find it difficult to understand why the prime minister has singled out public transport as somewhere to wear a face covering when a range of other activities share its characteristics.

“We now need to see clear guidance for operators and customers but, in the absence of regulations, it is important that we respect everyone’s right to choose whether to wear a face covering.”