Originally Posted by
alexwuk
BA holidays will not allow this. They don't allow the application of the 300-mile rule and don't allow starting from London after a cancelled ex-EU segment, even if BA would allow such a thing for a 'regular' BA booked ticket.
This is not currently policy - they will allow another gateway in Europe. I was offered MAD instead of AMS, which is far further than 300 miles. But you're right, they will not allow London until there are no other options last minute.