FISHERIES enforcement officers will be blitzing the River Trent and other waterways in the Gainsborough area this weekend.
The Environment Agency has warned that its Operation Garda will continue until Sunday to make sure those enjoying the sport are licensed.
During the last blitz, which spanned the Jubilee weekend, intelligence was used to identify 'hotspots' and problem areas.
Several anglers were unable to produce a licence and were issued with offence tickets. Now the same approach is being used again in Lincolnshire.
Lesley Robertson, the agency's, environmental crime team leader, said: "Anyone found fishing illegally may face prosecution and a hefty fine.
"All anglers need a valid Environment Agency rod licence which allows them to use up to two rods. The money which the Environment Agency receives from rod licence sales is spent improving fisheries.
"People who don't buy a licence are cheating their sport and other anglers.
"So we urge people to help us crackdown on unlicensed anglers by reporting this illegal activity to us on 0800 807060."