Boris Johnson has said the Government’s Test and Trace system does provide “value” for money as its total budget soared to £22 billion.
The Prime Minister admitted there had been “teething problems” but defended the cost of the centrally-run scheme which has been heavily criticised for its failings.
About four in 10 contacts of those who test positive for the virus are still not being reached, according to the latest figures.
The Prime Minister announced an extra £7 billion for Test and Trace in his winter plan on Monday in a bid to increase testing and improve contact tracing. It takes the overall funding provided for Test and Trace this financial year to £22 billion.
“Of course, a new operation like this is going to have teething problems and difficulties and there’s no doubt that it has,” he said.
“And of course people have been frustrated sometimes by the service they’ve got and I recognise that, of course I do.”
But the Prime Minister added: “Is it value? It’s of such importance and such value because if we don’t have it, we can’t know where the disease is prevalent in the way that we do.
“And it enables people who have symptoms to get a test and find out whether they have got it or not and thereby take themselves out of circulation.”