Melbourne is typically 10-11 hours ahead of London, depending on the time of year. Both cities observe daylight saving time, but on opposite schedules (UK: March-October, Australia: October-April).
When UK is in summer time and Melbourne is in standard time (April-October): 9 hours. When UK is in winter time and Melbourne is in daylight time (October-April): 11 hours. During brief overlaps, the difference can be 10 hours.
Optimal meeting window: 5:00 PM - 7:00 PM Melbourne time (6:00 AM - 8:00 AM London in Australian summer, 7:00 AM - 9:00 AM in Australian winter). Late afternoon Melbourne catches early morning London.
Melbourne has one of the largest British expat communities outside the UK. Strong cultural and business ties connect these two Commonwealth cities.