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Almost all the papers lead with the new fines for people who fail to self-isolate, which the Observer describes as a "carrot and stick" approach to tackling a second wave of Covid-19.

It says officials in the north of England have warned for months that people on low incomes have not been self-isolating because they can't afford to.

The Sunday Mirror welcomes the measures, but says they must be properly policed and not left to members of the public to "snitch on their neighbours".

The Sunday Times says Boris Johnson is expected to make a television address on Tuesday to announce a further tightening of the rules. It says "the prime minister is locked in a furious debate with his cabinet" about how strict the measures should be.

For the Mail on Sunday, the divisions extend beyond the government, with a suggestion that the chief medical officer, Prof Chris Whitty, could resign if ministers ignore his recommendations for tougher restrictions - a claim denied by a source close to Prof Whitty.