Two new variants of coronavirus are expected to take over and become the dominant strains in the UK, experts have warned.
The XBB.1.5 strain, which has received the nickname of the "Kraken" variant, has been causing concern in the USA for some months, and more recently made its way to the UK.
Currently, Covid-19 cases in the UK are mainly made up of BQ.1 and its sublineages, the UK Health Security Agency (UKHSA) said.