As well as being one of the driving forces behind the Fisherman's Friend brand, Doreen also supported many good causes and community projects in Fleetwood, donating millions of pounds through the years.
Tributes have poured into today following the news. You can read some of the many messages here.
Here are just some of many pictures from our archives over the last 30 years.
13.
Doreen Lofthouse waves off a new tram which Lofthouse have sponsored on it's maiden voyage to Fleetwood with Tony Depledge, Tony Lofthouse, Duncan Lofthouse and Linda Lofthouse on board at Fisherman's Walk, Fleetwood
14.
Fisherman's Friend owner Doreen Lofthouse dug the first sod to officially start the Marine Gardens re-design at the Marine Hall in Fleetwood....Pictured with Doreen and her ceremonial spade are Leader of Wyre Borough Council Peter Gibson, and the Mayor and Mayoress of Wyre David and Glenice Bannister.