Interesting one yesterday, I was walking past my alarm control panel and it had a red light on and was saying 'Jamming', I cleared it down a couple of times and then didn't think too much of it. I then went to adjust a setting on the EvoHome controller and found that it had lost connection to every device. Most devices had the red triangle lost connection icon and some just had the egg timer icon on them.

After a while, maybe within the hour, it had all sorted itself out again. Only thing I can think of was that there had been a large car accident up the road from us and there were multiple emergency services vehicles at it.