The UK’s oldest identical twins have revealed they have tested positive for coronavirus.

The 96-year-old sisters Lillian Cox and Doris Day won the nation’s hearts after appearing on Good Morning Britain last year.

The siblings had host Piers Morgan in hysterics after admitting the secret to a long life was “plenty of sex”.

In a Facebook update, Lillian and Doris – dubbed the Tipton Twins – revealed they had contacted coronavirus despite “sticking to the rules” and spending most of their time indoors.

They wrote: “We are both in shock… we have been inside for most of 2020 sticking to all the rules and being careful, now this has happened and we can’t work out why or where we’ve picked it up from.

“We are writing this hoping we can save people from getting this horrible virus, PLEASE PLEASE PLEASE take this seriously – Covid is real and it’s affecting so many lives across the world… don’t let it affect yours or your families.”

Despite their predicament, the twins showed their humour was still very much intact, joking: “We have said in the past if Him up there wants us…. He’s going to have to run fast.

“We are running faster than ever because we both aren’t ready yet… we still haven’t met Jason Statham.”

Lillian and Doris made their TV debut on This Morning in 2019, but made headlines last year when they had Piers Morgan and Susanna Reid in stitches during their Good Morning Britain appearance in May.

“I want to know,” Piers asked, “Which one of you is my fan and which one isn’t?”

Lillian gave a thumbs-up to the camera, while Doris told him: “I still like you, Piers!”

And when he asked the pair what the secret to long life is, Lillian pointed at her sister and suggested: “Plenty of sex, Piers!”