Originally Posted by
Capricorn70
Thanks - if I do what you suggest, via BA.com, will it be considered a 'change' under I fare rules, and incur a fee?
I've never had this treated as a "change" when MFUing a T class ticket into CW, including during the last week.
Others have reported that they've been charged a change fee according to the fare rules when doing this. I don't think that can be correct, although in some cases it has turned out that the passenger has wanted to change to a different flight in order to MFU - and in that case, there is clearly a change involved with a change fee due.