An infectious diseases expert says any flouting of restrictions today could undo a lot of our hard work.
It comes as a further 349 new cases of Covid-19 were reported yesterday, along with 18 deaths.
349 people are being treated in hospital for the virus - up 13 in the past 24 hours.
The number of people in ICU remains unchanged over the same period, at 85.
Professor Sam McConkey, from the Royal College of Surgeons, is warning against meeting up with people you they don't live with.