John car - you may be right in principle and the best of luck to you. However, I think the issue will be whether she can board the flight in the first place. Have a read of this article, which discusses why refugees don't fly in from Ethiopia etc. instead of paying trafficers thousands. From an airline's perspective they have the right to refuse boarding. I think I suggested driving to Calais previously, thus you speak directly with UK border sitting at the Chunnel/ferry terminal.
https://fee.org/articles/why-are-so-...gees-drowning/