Originally Posted by
zen100
YQ is usually cheaper if you start outside the UK and transit via LHR.
Which is odd, given it's supposed to be a fuel surcharge - and you are using more fuel by doing this.
To some desintations, the difference can be huge, in other cases, not so much. But YQ is usually cheaper than exLHR - that that's before considering the APD. The starting city doesn't seem to matter (as long as it's outside the UK). It (mostly) varies by destination.
On BA ‘YQ’ is a ‘carrier surcharge’ and not a ‘fuel surcharge’. It has not been referred to as a fuel surcharge for many years.