Thanks for all the advice on my YYZ to London tickets. (especially ChrisA330 for the kind words)
I guess the added twist now (can't see it lasting long and talk about shutting the stable door after the horse has bolted!) is a 14 day compulsory quarantine on arrival in the uk which would make my 5 day trip a 19 day trip. (given the UK is THE hotspot in Europe) as is the US - coming from there makes sense but not from Canada.
We'll reflect on it for a few days, but I can see the UK government coming under tremendous pressure to lift or modify the 14 days. (all biz trips are off!)
We will be travelling in the winter for my partner's 50th to South America and so a full credit is perfect as we're confident we'd use it. I don't need the cash right now, but certainty around my trip is priceless right now.
Thanks again