Originally Posted by
petez
Any views on working out a reasonable % of cost of ticket that would sit OK in a MCOL?
If you look at this thread's wiki, there is a reference and link to Mennens. This is how downgrades should be assessed, which is a bit complex admittedly, but I think it's ok to estimate to say a 5€ level of accuracy. You can use CEDR as an alternative if you prefer, but actually I would also go MCOL on something like this. Note that if BA have sent it off to the Refunds team, it will take them several weeks to calculate your refund. In this case I suspect Mennens will be more generous than BA's calculation method, but maybe with the Avios it is close enough (?).