Air Transat
You have to wonder why Canadian Affair aren't a little more up to speed with what Air Transat are doing considering they are both owned by the same company!
I did travel from Toronto to BHX a couple of weeks ago on the A310 (i'm from Coventry but live in Ottawa now), they've cleaned them up quite a bit compared to last year. New seats, carpets, refurbished washrooms and even mood lighting. I certainly can't complain for the price I paid.
I was also impressed at how the airport managed everyone at immigration too, directing anyone eligible to the e-gates and taking families with young children to the front of the queue. All in all a pleasant experience.