I actually did wonder if the place was open this early not realsiing it was indeed half term hence my comments about 'testing'. What does interest me is what sort of lasers they use because the pics on the web look pretty spectacular but as I pointed out tis just to the north of the Compton SIDs for easterlies and ty much over it at the point where the 27R SID is in a right turn to pick up the track to Compton.
All that said I am sure legoland would have had to pass some kind of check on laser shows as it is so close to LHR