London is typically 4 hours behind Dubai. When it's 4:00 PM in Dubai, it's 12:00 PM in London. Dubai does not observe daylight saving time, while the UK does.
During British Summer Time (late March to late October), the difference is 3 hours. During GMT (November to March), it's 4 hours.
Optimal meeting window: 9:00 AM - 2:00 PM London time (1:00 PM - 6:00 PM Dubai). This provides excellent business hours overlap between both cities.
Note: Dubai's work week runs Sunday to Thursday, with Friday and Saturday as the weekend.