Athens is exactly 2 hours ahead of London year-round. When it's 12:00 PM in London, it's 2:00 PM in Athens. Both cities observe DST on the same schedule.
Greece uses Eastern European Time (EET, UTC+2/+3 with DST) while the UK uses GMT/BST. The 2-hour difference remains constant throughout the year.
Excellent overlap! 9:00 AM - 5:00 PM London corresponds to 11:00 AM - 7:00 PM Athens. Nearly full business day overlap.
Athens is a popular destination for British tourists and business travelers. EasyJet and British Airways operate multiple daily flights on this route.