Only had one experience of IRROPS since getting GGL - LCY-GLA flight went tech. I was on a flex ticket anyway, but called GGL line who put me on the flight 90 mins later. Was much faster than colleagues who had to call corp TA, and even though I was told that I might need to get physical boarding pass as app might not refresh etc. that all worked fine. Appreciate I may have been helped by underlying ticket type.

I am taking CWLCY in a few weeks, probably highest likelihood of IRROPS (followed by my multi-stop return from west coast (SAN-LAX-NYC-LHR-DUB) - may get better sense after that!