Bee took victory at Exeter in a new championship record of 11.54 seconds, which moves her up to second in the UK rankings.
However, Harris was right on her shoulder all the way and also set a lifetime best, clocking 11.61 seconds, which puts her fourth in the UK’s top list.
North Devon’s Emily Tyrrell also ran under 12 seconds in the final, making it the fastest under-17 hurdles race in the country this year.
Bee also broke her high jump PB at Exeter Arena. She leaped 1.62m to take gold.
In the under-17 long jump, Tyrrell won in 5.50m, with Bee second in 5.36m and Harris third in 5.30m.
City of Plymouth’s Elysia Morris won the under-13 girls’ long jump with 4.21m.
In the under-15 girls’ long jump, Erme Valley’s Estelle Hodges set a new PB of 4.90m to finish second. She also finished second in the 75m hurdles in 12.39 seconds.
In the under-13 girls’ 70m hurdles, City of Plymouth’s Lili Fern took victory in 12.38 seconds. She also finished second in the 100m flat, finishing behind her team-mate Janea Oligan. Just two hundredths of a second separated them, with Oligan clocking 13.73 seconds and Fern 13.75.
Tavistock’s Ben Pitts won the under-15 boys’ 200m in a new PB of 24.61 seconds. He also finished second in the long jump with 5.37m.
Team-mate Joe Wheeler won the under-13 boys’ 200m in 28.21 seconds, which was a new best mark. He also set a PB finishing second in the 100m of 13.42.
City of Plymouth’s Mali Heard won the under-13 girls’ 200m in 28.71, while team-mate Hayley Harvey triumphed in the women’s 200m in 25.90 and the 400m in 58.68 seconds.
Tavistock’s Jade Kinsey was second behind Harvey in the women’s 400m, clocking a new best time of 60.04.
Erme Valley Harriers’ Nathan Brown won the under-20 men’s 400m and 800m. He clocked 52.08 second for the one-lap race and 2:01.75 for the two.
City of Plymouth’s Tyler Johnson took gold in the men’s 400m in 50.60, with his club colleague Dean Smith claiming silver in 51.74. Plymouth actually had the top six in that event.
Team-mate Alasdair Carpenter also took gold in the men’s 400m hurdles in 1:02.87.
Erme Valley’s Ella Isaias secured victory in the under-13 girls’ 600m in a new PB of 1:50.80. Second was Tavistock’s Isabella Page in 1:53.63.
Isaias also claimed gold in the under-13 high jump with 1.35m. Plymouth’s Erin Muldoon took second on count-back also with 1.35m, which was a new best.
Erme Valley’s Bronwyn Harris won the under-15 girls’ high jump with 1.47m. She also took gold in the discus with 20.51m and came third in the shot.
Club colleague Hamish Harrison triumphed in the boys’ under-15 high jump with 1.40m.
City of Plymouth’s Noah Jones won the under-13 pole vault with 2.40m. He also came second in the shot with 6.41m. Colleague Steve Broomhead won the men’s long jump with a PB of 6.27m.
Tavistock’s Edward Mills took gold in that shot putt event with a new PB of 7.99m.
There was a new PB for Plymouth’s Mia O’Daly in the under-17 girls’ discus. She won silver with 32.46m.
In the long distance events, Plymouth Harriers’ John Porter came third in the men’s 1,500m and 3,000m. He clocked 4:26.22 for the 1,500m and 9:27.46 for the 3,000m.
Tavistock’s Natasha Farrington was second in the women’s 3,000m race and first under-17 in 11:12.83.
Full results from the championships can be found HERE.