A spokesperson for Warburtons said the building had been safely evacuated, and the cause of the fire – or extent of the damage – was not yet known.
Self-made millionaire Fishwick made his fortune from selling vans, and founded Burnley Savings and Loan in 2011 to give local people affordable credit.
The Netflix film Bank of Dave, which was a fictionalised account of his attempts to get a banking licence for his credit union, was released in 2023, starring Rory Kinnear.
Warburtons is the UK’s largest family-owned bakery firm, founded in 1876 in Bolton.
In an update at about 21:00, the fire service said it would be at the scene for the “foreseeable future” and asked people not to fly drones near the site, as it could make it difficult for its own drones to survey the scene.
