Never been wait listed, but to be honest I have only once failed to get an upgrade to First with points once at check in and that was from LHR when the flight was totally full

Normally as a Plat you are at the top of the list for upgrade requests anyway and I know for a fact that a few times they have let me upgrade over Gold and Silver

Maybe it would be good to call them back and ask them to double check, I seem to remember once or twice being told there was no availability but as a plat they would see if they could get a seat for me and confirming by email a few minutes later.

How was your Man flight this week? I had an awesome crew in First from BHX on Monday