It appears that they were kept on board again, the second time this week.
Taken from RTE
IAPA calls after second Prestwick diversion
15 April 2006 15:05
The Irish Airline Pilots' Association has called on the Department of Transport to clarify what security procedures are being used by airport authorities in Britain.
An Aer Arann flight from London to Galway was diverted to an airport in Scotland last night, and passengers were then forced to wait on board for over an hour.
Flight RE508 took off from Luton airport around 10.30pm last night.
Shortly afterwards staff found the note and raised the alarm.
The plane was escorted to Prestwick airport, near Glasgow, by two RAF Tornado jets and landed just before 11pm.
Officials say the 53 passengers and crew disembarked safely and the plane was searched.
Police have confirmed that the note was a hoax.
It was the second plane bound for Ireland to be diverted to Prestwick airport this week.
On Wednesday, a Ryanair flight from Paris to Dublin was also diverted there, after a steward was passed a note saying there was a bomb on board.
Passengers on that flight had to stay on board for two hours before being allowed to disembark.