London is typically 5 hours and 30 minutes behind Mumbai. When it's 3:00 PM in Mumbai, it's 9:30 AM in London. India uses a unique UTC+5:30 offset and does not observe daylight saving time.
During British Summer Time (late March to late October), the difference is 4 hours 30 minutes. During GMT (November to March), it's 5 hours 30 minutes.
Optimal meeting window: 9:00 AM - 1:00 PM London time (2:30 PM - 6:30 PM Mumbai). This provides excellent business hours overlap between both cities.
London and Mumbai have strong business ties due to historical connections, making this a very common route for calls.