TUI have just cancelled all holidays to Zakynthos. There were infections on other planes as well as the 2 UK planes. That seems sensible to me - the last thing TUI wants is the whole of Greece excluded.
There's a lot of pressure on the UK government for Scotland and Wales to remove Greece from the safe corridor list. If that happens then insurance will not be valid, unless (I believe) people are already there.
Apparently, people are giving false addresses on their arrival forms, making tracing impossible. The airlines all have this vital information, and I think it should be compulsory for them to release this data to the health authorities. Some may scream "invasion of privacy," but the virus has no respect for that.
66 people were fined on Corfu over the weekend for not wearing masks.