Coronavirus home-test kits require an email address, leaving 'five million' without internet access in limbo, it has been claimed.
The Sun reports people with symptoms are being told to call the 119 hotline if they don't have a computer, only to find arranging a swab collection requires an email.
This means many non-tech savvy Brits - including some of the most vulnerable - who also can't get down to a test centre cannot be tested.
It comes after the Health Secretary Matt Hancock unveiled a huge expansion in eligibility in the latest step to prepare for easing lockdown.
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Covid-19 testing is now being offered to everyone over five years old who has symptoms - but Age UK yesterday labelled the move "worthless" if it fails to cater for so many.
One pensioner told The Sun: "This is absolutely ridiculous, I have been suffering from symptoms for weeks.
"For people like myself the telephone is the only way of communicating with others when you're stuck at home during lockdown, but the government just assumes that everybody has got modern technology.

"I can't get tested at all, so what am I supposed to do?" added the 68-year-old.
Mr Hancock said, earlier this week: "Everyone aged 5 and over with symptoms is now eligible for a test. That applies right across the UK in all four nations from now."
It is the latest expansion in eligibility, three weeks after testing was extended to over-65s or people who need to leave home for work, with symptoms.
While Mr Hancock did not make an explicit link, it comes days before the government hopes to reopen primary schools for millions of pupils in England.
But his announcement was made after long initial delays in rolling out testing. And it came hours after it emerged a "track and trace" app has been delayed to the "coming weeks", from its original date of mid-May.
Meanwhile the government has set a target of 200,000 tests per day by the end of May. But the target is for capacity - not the number of tests carried out.