As of today (March 9), Royal Brunei Airlines (RBA) has stopped flying from Heathrow's Terminal 3.
The Asian airline now operates out of T4. RBA's check-in desks will be located in zone D.
Business class passengers and Gold Card members of RBA's Royal Skies frequent flyer scheme can use the Etihad Lounge, located near Gate 10.
Steven Leong, senior vice president ground services, said: "Relocating to Terminal 4 will allow our passengers flying to and from London to enjoy a new level of service.
Sandra Bloodworth, area manager UK, added: "There has been huge investment in Terminal 4 and we are confident there will be an improved passenger experience with the enhanced facilities available."
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