The Covid variant first found in Kent is set to become the world’s dominant strain, the head of the UK’s genetic surveillance programme has predicted.

Prof Sharon Peacock told the BBC’s Newscast podcast the new variant has “swept the country” and “it’s going to sweep the world, in all probability”.

She said her work sequencing variants of the virus could be required for at least 10 years.

The Kent variant has already been detected in more than 50 countries.

It was first detected in September 2020 in south-east England and its rapid spread over the preceding months cited as the reason for the introduction of new lockdown rules across the UK in January.

Prof Peacock, director of the Covid-19 Genomics UK consortium, said: “What’s really affected us at the moment is transmissibility.”

She added: “Once we get on top of it [Covid-19] or it mutates itself out of being virulent – causing disease – then we can stop worrying about it. But I think, looking in the future, we’re going to be doing this for years. We’re still going to be doing this 10 years down the line, in my view.”

Current vaccines were designed around earlier versions of coronavirus, but scientists believe they should still work against the new ones, although perhaps not quite as well.

Prof Peacock said the vaccines approved for use in the UK appeared to work well against the existing variants of the virus in the country.

The Covid-19 Genomics UK Consortium is a network of public health bodies and labs and currently analyses nearly 30,000 positive tests a day.

In recent weeks, it has been explained that about 5-10% of positive tests are selected randomly to be sent on for further genome analysis but the Consortium says that it has an aim to genetically screen every positive Coronavirus test.

Professor Peacock is Professor of Public Health and Microbiology at Cambridge University and was previously director of the government’s National Infection Service.

She told Newscast that while it is normal to see variants only a very small number have “special features”. These can make them more transmissible, avoid the immune response and affect vaccination, or have the potential to cause more severe disease.

“These are the things we are looking out for. I’d say it happens vanishingly rarely but we have to be on the look out for it,” she said.