Letters inviting people to get the COVID-19 jab were delayed in the North East, raising concerns about the management of the all-important vaccination booking process. Sky News has learned that some vaccine letters sent to elderly people in the region did not arrive as expected on Friday 8 January. The error was discovered when staff at NHS Digital realised no-one was booking appointments at Centre for Life, the mass vaccination site in Newcastle-upon-Tyne. A spokesperson for the NHS in the North East and Yorkshire confirmed that some letters had been delayed, but said that the Centre for Life had appointments booked from Monday, when mass vaccination sites opened.