If Ground Handlers were not ready to take diverted A/C or an A/C had to divert elsewhere due to poor preparation or lack of operational staff, and the reason was that they had to take their 'eye off the ball' to update info screens, this to say the very least would not go down very well.
SO....you honestly think that the ground handlers who are out turning around the aircraft, then run in and update the arrivals info!!!
Get real.....this is someone elses job to update it and they just cannot cope with anything out of the ordinary, much like the majority of the UK.
If the airlines tell you to check with the airport, or check the website before travelling, the very LEAST that should be done is to maintain the accuracy of the flight info.
This is to stop UNNECESSARY journeys on hazardous roads for people.
it should be made into a priority.