What time is it in Riyadh when it's noon in London?

When it's 12:00 PM in London, it's 3:00 PM in Riyadh.

How many hours apart are London and Riyadh?

London and Riyadh are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.

London uses Europe/London (the IANA time zone database identifier).

City time converter

Convert the current time in London, UK to Riyadh, Saudi Arabia. Daylight-saving adjustments applied automatically.

Common times in London and their equivalents in Riyadh:

Table computed using a fixed reference date for stability. Use the full converter for any date and time.

Country: UK
Zone: Europe/London

Country: Saudi Arabia
Zone: Asia/Riyadh

What time is it in Riyadh when it's noon in London?: When it's 12:00 PM in London, it's 3:00 PM in Riyadh.
How many hours apart are London and Riyadh?: London and Riyadh are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.
What time zone does London use?: London uses Europe/London (the IANA time zone database identifier).