My internal resistance to doing my tax return (today is last day in UK) and paying the state any money is very very high. It's like getting an invoice from someone robbing your home right now.
Will they let you file an extension? After all - Covid/Lockdown/Economic Impact - I'm sure you needed all your money to keep healthy, buy meds, masks and hand sanitizer, right? After the Jan 20th steal I'm filing an extension, that's for damned sure. (But I'm in the US.) Have a great day, Martin!