Originally Posted by
corporate-wage-slave
Considerably more? BA will expect you to use public transport from LHR to Docklands, and that's in the £4 to £30 range. Some on here have knocked up hotel bills into the thousands of pounds after cancellations and overbookings. When it's the destination airport affected then BA has to pay up any extra costs, that's the law.
And for the OP's benefit, the relevant case law (
WZ v Austrian) says that the airline is liable for:
the amounts incurred by [the passenger] and which, in the light of the specific circumstances of each case, prove necessary, appropriate and reasonable to remedy the shortcomings of the air carrier.
The "shortcomings" here being the failure to arrange transport to the booked destination airport.
So the question would be whether the cost of a taxi is "necessary, appropriate and reasonable". At midnight when there are few public transport options? Probably, yes. But during the bulk of the day when public transport will get you there just as quickly if not quicker, with only one change, and at a fraction of the cost? Probably not.