I’m also waiting for a replacement lost passport. The hold up was the cancellation I did last year not being processed properly. I have now submitted the ref today and was told that it should go to examiner withing 3 days. I fly 1st June and has born processing since 28/3. Had they have informed me they were waiting on this I would have re done the cancellation earlier. Now its just a waiting game until 18th May where I can try and upgrade.