Riyadh is typically 3 hours ahead of London. When it's 12:00 PM in London, it's 3:00 PM in Riyadh. Saudi Arabia uses AST (UTC+3) year-round.
During UK summer time (March to October), the difference is 2 hours. During UK winter time, Riyadh is 3 hours ahead of London.
Good overlap! 9:00 AM - 3:00 PM London corresponds to 11:00 AM - 5:00 PM Riyadh (UK DST) or 12:00 PM - 6:00 PM (UK winter). Morning London catches afternoon Riyadh.
Saudi Arabia is a major UK trading partner, particularly in defense, energy, and construction. British companies have significant investments in Saudi Vision 2030 projects.