£100 to upgrade from BRU-LHR and similiar, IIRC, for DUS-LHR from Y to J.
IST-LHR was more last year, but I am not sure - £150?
In December last year, I paid £125 for the upgrade to CE for LIN-LHR.
Last edited by TravellerFrequently; Aug 25, 2010 at 10:56 pm
Reason: Add LIN.