The announcement yesterday that the UK could now work at regional level (islands only) and at this level 7 Greek islands (Lesbos, Tinos, Serifos, Mykonos, Crete, Santorini and Zakynthos) were identified where people have to go into quarantine on returning to UK and FCO have updated travelled advice effectively preventing future holiday travel.
If you look at this from a Kefalonia perspective the announcement is good news for those who are here on holiday now and intending to visit later as the statistics are low and as long as it continues that way there should be no impact from places in Greece where the figures are significantly worse.
However, if you open this up to Greek perspective the announcement must be more annoying as there are no public figures available yet to justify how these islands were selected especially when you consider for weeks now Greek data has reported the centre of the main case load in Greece is in the big cities of Athens and Thessaloniki yet travellers on the mainland have no quarantine or future travel restrictions!
A final thought when you go back to country level and the statistic the UK was using as a control level of cases per 100,000 is Greece is still well below this level as can be seen from the chart below but the UK is rising significantly, so what do they do if their figure goes above 20??
Find more statistics at Statista