The Foreign & Commonwealth Office continues to advise against all but essential travel.

Nevertheless, for those who must undertake essential travel, it has now published guidance for what you should consider if doing so:

Coronavirus (COVID-19) essential international travel guidance
This page provides guidance on travel during the COVID-19 pandemic. The Foreign & Commonwealth Office advises against all but essential travel.

NB - many travel insurance policies specifically will not cover anything to do with Coronavirus if the travel was booked after lockdown began in March.  You should check with your insurer so you know exactly where you stand.