UK residents refusing to self-isolate, when told to, will from today face fines of up to £10,000. Anyone who tests positive for Covid-19, or has been told they have been in contact with someone who has, now has a legal duty to quarantine. It will now be a punishable offence not to comply with an official instruction to self-isolate, with fines starting at £1,000 and rising to £10,000 for repeat offenders or serious breaches.