Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,872
The A350 (as with all widebody aircraft*) should always be Door 2L on single airbridge gates, except where there is an infrastructure limitation / restriction at the airport.
*Except the A380 which very rarely would have a single airbridge, and only then in unplanned circumstances.