Boris Johnson advising people to avoid crowds as the sales start. Non-essential shops remain open for business on the high street in Tiers 1, 2 and 3 with Next stores across England welcoming keen customers in from 5am.The prime minister had advised people avoid hitting the busy annual post-Christmas sales as a new mutant strain of coronavirus has caused England's south east to move into Tier 4.A queue for Next was pictured on Saturday morning in North Tyneside where shoppers were organised to keep their distance from one another.It was still dark when photographers snapped eager Next customers leave the shop in Liverpool with bags full to the brim.Security guards were deployed in Birmingham to ensure social distancing guidelines were.