I thought not, but apparently if you fly Sydney to London on BA15 or 16 all the way, they will.
More details here:
http://www.britishairways.com/en-au/offers/flights/first-transfer-service
I believe this is the only routing they offer it on.
Does anyone have any knowledge or experience of how additional kms are charged outside the 50km zone in Sydney? I'd guess a per km charge? Can anyone tell me how much?
Thanks,
JF75