Thanks to Nationwide sprinklers for this information:
At around 15:45 hours on Wednesday 5th August 2015, Notts F&RS mobilised two appliances to a report of fire in a dust extraction unit at a joinery workshop in Catton Road, Arnold, Nottingham.
Upon arrival the fire was located inside the unit but additionally to deploying one hosereel and one jet to cover the fire, it was noted that the sprinkler system had operated.
Crew manager Zac Goodspeed told Keith Rhodes that upon arrival they found one sprinkler head above the unit had been set off and had prevented the fire from spreading to other plant and materials. The unit was on fire internally and had badly smoke logged the workshop but, because the fire was contained, firefighters were able to extinguish it without too many problems
Owner Paul Jeffries told Keith that he didn't realise the sprinkler system was live, but that it had saved his premises. His main concern was now fulfilling customer orders.
The sprinkler system is reported to be very old and had not been maintained for more than 15 years. It runs off the town main but has no means of isolation and so Nationwide were called to isolate the system. The activation has caused some fractures in pipework which the owners seem now willing to deal with and reinstate the whole system.
Fires in wood-working premises often take hold very quickly, resulting in extensive fire spread and damage. The sprinkler system had prevented this from happening.