I have nc as this will out me.
So about 40 minutes ago watching a movie with DD and we could hear beeping.
Looked a around the house even the loft and it's not from my home.
The beeping was strongest on the landing and I realised it was next doors smoke alarm.
We are a semi so ran round and knocked on their door. All the lights are on but no answer. I lifted the letter box and the hallway looked smokey.
I was in my dressing gown so put on legging and a t shirt and jumped over my back garden wall in to their garden as the blinds were down at the front.
Kitchen looked full of white smoke so I called 999.
One fire engine turned up firemen jumped the wall and agreed the kitchen was full of smoke so they kicked the door panel in to gain entry.
By this time 2 other fire engines and a fire car had turned up.
Upshot is the couple that live there had set off a bug bomb and left the house.
It hasn't occurred to them that a smoke bomb would set of their smoke alarms.
I feel so guilty that 3 fire engines turned up their back door kicked in ( fireman has fixed it) and no fire.
Everyone's gone and I am now left waiting for the neighbours to return so I can tell them what I have done 
The fire service and other neighbours all say I did the right thing calling them but I can't help feeling guilty.
Please help me figure out how to break the news 