Lewis North thought he was moving into a swim before the fish arrived, but found them already there and made the most of it.
This 49lb 14oz common, the biggest in the lake, was his reward at Old Mill Lakes in Market Rasen, Lincolnshire.
Fishing the day-ticket Birch Lake, the 22-year-old also landed a 30lb 4oz mirror.
He said: “At the start of the session I didn't see anything to go on, so I set myself up in a swim that would suit the weather that we had coming over the next few days.
“As I was setting off, the fish started giving themselves away so I wasted no time and got myself around there to be on fish from the off.”
The Hull angler positioned his rods next to the bands of onion weed where he’d seen the fish and baited with about 750g of Sticky Krill boilies on the first night.
He said: “The next morning the biggest common in the lake turned up at a whopping 49lb 14oz.
“I kept on baiting little and often, which got me another few bites and the next one was a 30lb 4oz mirror.”
Lewis used Krill pop-ups on Ronnie rigs tied with size 4 Korda Kurv hooks, 25lb Korda Hybrid Semi Stiff and 3oz leads.