A Ryanair flight bound for Scotland was forced to make an emergency landing after an onboard medical incident last night.The FR654 flight from Tenerife declared the emergency around an hour into their journey from the Spanish holiday hotspot to Glasgow Prestwick Airport.The flight , had left the island at 7.44pm after being delayed for an hour, made the unscheduled diversion to the Humberto Delgado airport in Lisbon at around 8.40pm.It had been …