You can buy the OWE upgrade to WTP (AUD 600 LHR-SIN etc. and AUD 900 LHR-SYD etc.) and then MFU from WTP to Club. No MFU from L to J is possible (probably why BA created WTP, to prevent such upgrades).
The MFU rules depend upon whether you use BAEC or Asiamiles to do the upgrade. The Asiamiles rules are a lot more generous, btw.
Last edited by number_6; Apr 23, 2007 at 3:45 pm
Reason: corrected upgrade cost of LONEx and added Asiamiles