Originally Posted by
adrianjc32
It makes absolutely no difference, but for some reason there are many customers on here who think it does. As far as BA are concerned the only difference is that it's less convenient for the customer as they will need to use a kiosk to collect it at the airport.....

Sorry disagree - it
does make a difference. If you have checked in then the BA agent selling you the upgrade has to "offload" you i.e. cancel your check in, before they can process the upgrade. IME it can add about 15-30 mins to the process.