Originally Posted by brightstar100
My fiance and I are flying to SIN in fully paid F (we are both Gold). Since booking, I have bought a ticket in J for my mother and she will travel out with us.
By "ticket in J", do you mean a ticket in the NCW cabin, or do you specifically mean a NCW ticket with a J class fare basis?
If it is the latter then, having a quick look at the BA fares pdf for the LHR-SIN route, for eg. if you bought a J2BA you could upgrade to a A fare for under £200. (Upgrading from a CRT1 fare would be about a grand.) Similarly if you bought say a (insanely ridiculous!) JRT fare, you could actually "downgrade" to a F2BA1 fare which is substantially cheaper!
I'm not sure if you'll be able to officially upgrade thru ticketing/reservations from a I or D fare though.