Last week, Prime Minister Boris Johnson announced a new tier system, imposing further restrictions on areas where cases of coronavirus continue to rise. London was placed in Tier 2.
This means people are banned from socialising with anybody outside their household or support bubble indoors.
Other areas across England, including Lancashire and Liverpool, have been placed in the highest level, Tier 3.
Pubs and bars have been forced to close and people are banned from mixing households both indoors and outdoors.
But while the Prime Minister and the Government have been criticised for imposing these new restrictions, Good Morning Britain co-host Mr Morgan has said the alternative would be “catastrophic”.
Writing on Twitter, Mr Morgan said: “Nobody wants a lockdown.
“They are miserable things that restrict our freedom and cause non-covid health and economic havoc.
“But without the ‘world-class’ testing system we were promised, but don’t have, the only alternative is to let the virus run free and that would be catastrophic.”
The UK currently has the highest number of COVID infections across Europe after surpassing 700,000.
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“London is a huge city, it’s one of the great global cities of the world.
“Most of their boroughs are bigger than many of the towns around the UK, and the figures vary dramatically from one end of London to the next.
“So South-West London has incredibly low levels of the spread, others have higher but the average, even including some of the highest, is still very low relative to places like Manchester and to Liverpool and many of the other towns.
“It is a staggering blow to London and to the hospitality sector.”
Mayor of London, Sadiq Khan, told Sky News it was “inevitable” that the capital will have passed a “trigger point” in the second tier.
He said: “Across our city… there average over the last seven days is about 90 per 100,000.
“All the indicators I have, hospital admissions, ICU occupancy, the numbers of older people with cases, the prevalence of the disease, the positivity are all going the wrong direction.
“Which means, I’m afraid, it’s inevitable over the course of the next few days London will have passed a trigger point to be in the second tier.”
According to government figures, London has recorded 62,340 cases since the pandemic began.
Figures released by Public Health England found Brent has 2,781 confirmed cases, with Barnet recording 2,971.