Oilman, it seems it's a problem that began to show up about 4 or 5 years ago and is all connected to the engine management system. I know a contractor who had 26 Peugot Vans, all bar 4 had serious electrical faults within the first 18 months..he now has all VW vans!!
A couple of the vans, the problem was so bad they had to have the EMS ripped out and a new one installed.
I'm not sure if Peugot have now corrected this issue, apparently they bought the EMS's "off the shelf" from Fiat and retro-fitted them to their cars, and this was the source of the problem apparently..I was told this by a Peugot Main Agent Technician.
I'll be honest I have not heard anything specific to the Alarm/Immobiliser system, but a few of the vans did have issues in this direction, not sure if they were related.
The PMT that I spoke to advised that if I bought a Peugot (I considered a 206CC as a little runabout) then I should have the factory alarm disconnected by an Alarm Expert and have a Insurance Validated TOAD Alarm installed. He said the factory fitted units were rubbish and that they would not stop the car being stolen or even deter a theif!!