Agent Reference Section on the Air Canada Agents Website:
One-stop shop for all policies, procedures, ticketing info and more. The Agent Reference Section should always be your first point of reference for assistance see below link,

https://www.aircanada.com/uk/en/ado/drs/agents.html#/

Trade Support:
Trade support team, based in the UK available to the trade to answer questions or help when things don’t go to plan. The team works Mon-Fri 9am-5pm and can be contacted using the following contacts,

Email [email protected]
Phone on 0871 220 3220 option 2. 

Group Support:
Air Canada Group Travel is for groups of ten or more passengers travelling together to the same destination on the same date and on the same flight. If you have any group request, please contact our dedicated team using the following contacts,

E-mail [email protected]
Phone on 0871 220 3220 option 3.