I think much will depend on the Government advice which may be forthcoming on Sunday.
I have just watched the Transport Select Committee hearing and John Holland Kaye (Heathrow) and Karen Dee (of the AOA) both noted that clear direction was needed in the next few weeks around timescales to avoid the potential for significant job reductions in the airport sector. JHK spoke about a 3 to 5 month window for start up as avoiding this which suggests June may be a bit optimistic. Maybe domestic routes but until there is some wider inter-government plan for opening borders it is very difficult for anyone to plan with any certainty.