Where on earth are you thinking of flying to with a pregnant passenger? You won't be very far away from an airfield in the UK.
It is MOST unlikely that the baby will arrive with the haste demonstrated for dramatic effect on tv (they do occasionally but VERY occasionally)* If you are worried contact the nearest airfield, explain the position, request a landing and ask for an ambulance to meet you.
*In case you are wondering, I'm a qualified midwife who worked in the Community for many years and sudden arrivals were very few and far between, especially with first babies. Second ones may be in a bit more of a hurry but not necessarily so.
