Question Author
vortex
/// Regarding the circumstances of where she was, she went into labour 3 months early and so finding herself in the UK was a fluke. ///
You really think so?
She would have travelled directly from Nigeria to the USA, (can't see why she needed to go via London) but when refused admission into the US, somehow managed to get her flight ticket altered to drop off at Heathrow.
I can see no reference about her going into labour on her way back to Nigeria, thus forcing the Nigerian flight to divert to Heathrow.