The story as posted today in the Lithuanian press is that a young man born in 1993, who was subsequently arrested, and who lives in a village near Kaunas, telephoned the police to 'warn' that a passenger aeroplane about to land in Kaunas had a bomb on it.
There were no aeroplanes due to land within the timescale suggested in the phone call. There was however the Ryanair flight to Luton about to take off.
A full check was made of that aeroplane. No bomb was discovered. The aeroplane was permitted to take off.
Clearly the UK must have been informed of the hoax call and it seems that the UK was not taking any chances.