Sign up for the latest from M.E.N. political editor Jennifer WilliamsMatt Hancock will lead a press conference from Downing Street this afternoon.The Health Secretary is expected to give an update on the UK's coronavirus vaccine roll-out after the government published a 47-page Covid-19 vaccine 'delivery plan'.Mr Hancock will be outlining further plans for the vaccination programme as the government tries to reach an ambitious target of vaccinating nearly 14 million people by mid-February.The government has pledged to set up 50 mass vaccination centres in England, and to give "at least" 2 million people per week a dose of vaccine by January 31.People in the first four priority groups - people over 70-years-old, anyone clinically extremely.