A controversial 10mph speed limit on England's biggest lake has been hailed as being successful, three months after it was introduced.
The limit is being enforced using hi-tech speed cameras
The Lake District National Park Authority (LDNPA) introduced the byelaw on Windermere, Cumbria, in March.
The authority said this has led to a safer and more tranquil environment.
However, it has also meant fewer high speed vessels have registered to use the lake, leading to an estimated £60,000 drop in revenue.
And a number of lake users are currently facing possible court prosecutions for exceeding the speed limit.
Emma Dewhurst, LDNPA corporate communications director, said: "The difference and improvement in quality of enjoyment is more striking than we could ever have hoped for.
"Local people and visitors are constantly telling us how much more they are enjoying the lake. And lake users, including sailors, canoeists, people who fish, row, swim or paddle, have got a bigger lake back."
Figures of registered powered craft on the lake show that by the end of May, some 3,382 owners of powered craft had registered to use Windermere, compared with 4,687 in 2004.