It looks as though they are presenting it to Parliament today.I doubt it’s actually illegal, however it is against the lockdown advice. You should not be meeting anyone outside your household inside or be within 2 meters of them outside.
Sex isn’t exactly a British thing to talk about so I highly doubt it’s even evening considered. I think bubbles would be good but I know people would take the piss as they already are. Frankly the vast majority of people aren’t following lockdown down anyway!
New lockdown laws in England make it illegal for couples living apart to have sex indoors
Updated law governs indoor gatherings where two or more people meet socially or ‘undertake any other activity with each other’
www.independent.co.uk