Was at LHR T2 Arrivals this afternoon. There is a reasonable amount of seating in front of the exit area but you cannot read the screens unless you have binoculars as the characters are so small. I decided to check online and found that the main LHR website will give you the arrivals board but only up to the landing time. The updates about 'Bags Arriving' is not available. I did not bother to subscribe to their expensive SMS service to find out if you got more information that way.