Not wishing to give in to the incoming competition Air Transat have announced an expanded schedule from LGW next year;
Toronto will operate 11 weekly (10 in S15)
Vancouver will operate daily (6 weekly S15)
Montreal will operate 3 weekly (2 weekly S15)
Also a mention of 'higher capacity aircraft' being used for Toronto, presumably meaning a greater use of the A330-300's that have recently been converted to 9 abreast allowing for an extra 30 seats or so.
Glasgow to gain Montréal service next summer - www.travelweekly.co.uk