Nobody should travel to Red List countries. However, should an employee set out to travel to or through a red list country, they will be doing so in full knowledge of the requirement to quarantine in an approved hotel on their return. Therefore, the period of that quarantine should be accounted for in their leave request, as per the 5 June 2020 advice.
Nobody should travel to Amber List countries. However, should an employee set out to travel to or through an amber list country, they will be doing so in full knowledge of the requirement to quarantine for ten days (at home) on their return. Therefore, those 10 days should be accounted for in their leave request, as per the 5 June 2020 advice.
From 17 May, travel will be allowed directly to / from Green List countries. There is no requirement to quarantine on return but a COVID test must be taken on or before day two of arriving back home. If that test returns a positive result, then the employee will be instructed to self-isolate, in which case longstanding NJC advice will apply: stay at home (working if possible) on normal full pay until either (a) further tests return a negative result and they can return to work or (b) they go on to develop COVID symptoms, at which point they move onto sick leave and the usual provisions of the scheme apply.