LONDON : One of the UK’s senior-most government medical advisers on Sunday warned that the country was running into a headwind with the number of coronavirus infections at a “tipping point" similar to the one back in March, when Britain went into a national lockdown.Professor Jonathan Van-Tam, the Deputy Chief Medical Officer, issued a stark warning that the dreaded “R number", or the rate at which the infection is being transmitted within society, is now between 1.2 and 1.5, which means the epidemic grows larger as every one case generates more than one new case.His warning comes a day before UK Prime Minister Boris Johnson is expected to make a statement in the House of Commons on a new three-tier system of rules for localised.