Try to be mindful, your wife travelled on a BA/QF JV route, so the generous compensation offered via the QF channel will have been taken into account by BA (internally, if not expressed to your wife directly).

Back to the issue of passenger assistance. BA, QF and other airlines will pass on their customer's requests for assistance to the airport operator. So this assistance is not provided by individual airlines and at LHR, this service is delivered by Omniserv. In actual fact, in the EU it is the Airport Authority's responsibility to provide passengers with the necessary service to suit their specific needs.

You can find more information about this and guidance here:
http://www.britishairways.com/travel...o/public/en_gb
http://www.heathrowairport.com/heath...ial-assistance

Your wife and daughter's return transfer at LHR worries me. At 110 min, there is a risk the unhappy experience on the outbound may well be repeated. Do you know if your wife's ticket is flexible and would she be willing to rebook on to either an earlier flight from Copenhagen or later flight to Australia?