Discovery 2 immobiliser. Help please

F**ckin' eldritch .... anyway it must be something related to that frigging BCU

Well after much ****ing about yesterday getting RAC to recover my landy back to the garage I baught it from. Its now there for them to sort under warranty and I've got a crappy vauxhall zafira courtesy car but its better than walking. Making most of it tho took all 3 dogs out in it today which I didn't like doing in landy as they get it in a right mess lol. The RAC patrol who came to my work to have a look at it said sometimes cctv can interfere with the bcu, we do have a large cctv system at work so could this have caused it? I'm not 2 sure if it would to be honest

Did you find out what caused this?

I have exactly the same problem (except the led is flashing normally). Was alright when I parked it last night, no warning.