I've had a dig around the BBC News website and despite Italy being the lead story, https://www.bbc.co.uk/news/world-europe-51638095, quarantine and control of population movement doesn't get any 'column inches' - all they do say is borders aren't closing.
I'd guess the UK government have told them not to report quarantine in order to keep the UK population calmer.
I'd guess the UK government have told them not to report quarantine in order to keep the UK population calmer.