Officials in protective clothing clean every surface of this GP surgery.

The doctor here has contracted the Corona virus, and no one is taking any chances.

Thank you for calling County Medical Center.

Unfortunately, the building attack to close due to an urgent operational health and safety reason the GP as well as another health care worker is one of four U K cases confirmed today, all of whom came into contact with the first British case from Brighton and are now being treated at two specialist units in London.

These four cases are not a surprised us because they've come about through our contact tracing process.

So they are all in the groups that we were concerned about from a a case that was diagnosed last week on in many ways, the fact that we've identified them and they've tested positive shows that our contact tracing is actually working really quite well.

Here's what we know.

A British businessman attended a three day conference at the Grand Hyatt Hotel in Singapore on the 24th of January.

He flew to a French ski resort near Shamin E.

Four days later, he flew from Geneva to Gatwick on an easyJet flight and returned home to brighten.

Five days after that, he called N H s 111 and tested positive for the virus.

He's now in quarantine at Guy's Hospital in London.

It's thought is infected.

11 other Britons fiver in Frantz and the latest four were confirmed today and from Brighton.

The World Health Organization issued this stark warning.

The detection off This small number of cases could be the spark that becomes a bigger fire.

But for no, it's only a spark.

Our objective remains containment.

It came as the government announced the spread of the virus is now a serious and imminent threat.

It introduced special measures to enable them to force at risk people into isolation and to stop them from leaving.

Clearly, this is will benefit off the individual.

If they have been exposed on that risk, then having the appropriate medical care available to them rapidly, it will probably be very helpful.

It's also helpful from their own personal perspective, in terms of limiting on would spread to close family and friends.

This evening, this school in South Hampton locked its gates closing as a precautionary measure across the UK Everything is being done now to try to contain the spread of this virus.