Agree. BA British Airways has Not added much in Canada

since they ended its Calgary YYC service end of (October 2019) except for increasing Vancouver YVR/Toronto YYZ - London LHR, UK

flights

during Spring / Summer seasons.
As for VS Virgin Atlantic, their *new* Toronto YYZ - LHR starting end of March 2025 should do ok with feed from WestJet & don’t think they will add service from Western Canada until they see how well the YYZ service does.
I don’t think AC Air Canada has plans to do Edmonton YEG- London LHR on Boeing 787.
Once AC gets deliveries of the *new* Airbus A321 XLR, YEG - LHR is a very good possibility

.
Plus Ottawa YOW - LHR service will most likely be moved from the 787 to A321 XLR planes operating that in the future.
As for WestJet currently no, as they don’t have enough Boeing 787’s.