Donington athlete Ashley Sandall was in superb form as Nene Valley Harriers finished second in the British Athletics League Division Three at Peterborough on Saturday.
It was the first time the club had hosted a British League match and their performance leaves them joint second with Bedford after two fixtures, albeit behind on match points.
Crawley, who won on Saturday, are two points clear at the top.
English Under 17 indoor champion Sandall broke 49 seconds for the first time as he recorded his seventh win in eight outings this year.
It was a superb British League debut for the 16-year-old, who pulled clear over the second half to win by nearly two seconds in 48.98.
He said: “I usually get a bad start so I wanted to go out hard over the first 100m, then look to hold that speed for the next 300m and keep my shape to the line.
“I impressed myself with my time because I was hoping for just under 50 seconds.
“I got to 200m and I felt fresh, but it might just have been one of those days.
“I’ve trained well but I didn’t think I’d run that well and get a PB.”
Sandall will now run the Lincolnshire Schools Championships at Boston on Saturday.
Bourne youngster James McCrae showed maturity to finish third in the 800m B race in 1.58.96.
Competing against more experienced athletes, McCrae looked in danger of getting boxed in at one point but the 17-year-old finished well to gain valuable points for the club.
Crowland athlete Sam Lawrence finished third in the B-string javelin with 41.53m while Holbeach middle-distance athlete Lloyd Kempson was not far outside his week-old PB when clocking 4:01.68 for sixth in the A-strin 1500m.
Spalding multi-eventer David Bush competed in three events, despite a foot injury suffered when treading on a nail.
He ran a PB of 11:46.72 for eighth in the A-string 3000m steeplechase, was sixth in the B-string long jump with 5.47m and eighth in the B-string high jump with 1.50m.