Jeez... looks like I might be in trouble. Thanks all for your comments. Unfortunately, there is no viable backup plan possible, since I need to be in YYZ on the evening.night of the 23rd in order to make a 7 am YYZ-EWR on the 24th. I doubt if AC will put me on a UA flight from LHR-EWR/JFK if I miss my LHR-YYZ flight, even if I am booked in (paid) J on the LHR-YYZ. The only chance would be to try to make an earlier TLS-LHR flight on the 23rd... which would cut short my mini-vacation.
Guess I'll take my chances... and be prepared to run!
Thanks,
-Zombie-
(edited since I apparently can't say "dam*" on this board)
[This message has been edited by Zombie (edited 07-17-2001).]