Quote from the Herald:
A Scottish Ambulance Service supervisor said a Royal Navy Sea King helicopter carrying medical staff and incubators had landed earlier on Stornoway to help stabilise the twins.
He said: "We received a call at about 6.30pm last night that a 27 weeks pregnant female was having a twin birth.
"It is my understanding that the twins were born late last night, but we don't know what their condition is.
"We sent two consultants to Stornoway in the Sea King but, because of forecasts of snow and high winds, we didn't feel it was safe to fly to the mainland."
Being as the first a/c used was a Sea King, maybe the S-92 wasn't available?