This was a win for V40 Ali Young in a sprightly 2.28.74. Under 13s Matt Clifford ran a PB of 2.44.27 as did Alex Aldred with 2.46.43.
More U13 PBs in this one with Seb Porter running 2.41.29 and Beth Welham 2.42.02.
U15 Sandie Pohlman made her season debut with 2.37.35 and there were PBs for U15 Emma Kaye with 2.39.50 and U13 Emily Alderson with 2.39.82.
U15s Orla Fawcett (2.32.33) and Jess Orr had a good battle for 3rd and U13 Tom Hunter put in a good effort with 2.34.83.
U13s Kristian Everiss (2.36.22) and Phoenix Everiss (2.41.75) were slightly outside their best in this one.
U15 Scarlett Wager-Leigh got a PB of 2.28.2 here with U20 Amy Harris running well for 2.33.56.
There were further PBs for U17 Richard Slade with 2.26.26 and U13 Angus Williams with 2.28.13.
U13 Cameron Reid went third in the national rankings with a brilliant front run 2.18.32 to win Race 8.
Hannah Thear (U17) was off her best with 2.27.43.
Jake Alderson put in a huge PB of 2.15.46 to win Race 10.
U17 Jake Williamson (U17) was second in Race 11 to run a PB of 2.15.19. V40 Steve Winter ran 2.17.80.
There was a further Chiltern win in Race 12 with Toby Smith sprinting hard to run a PB of 2.14.00.
U20 Joe Cochrane ran PB of 2.05.91 in this one.
Race 16 saw U17 Jonty Wager-Leigh run a stunning 2.03.20 to be second and gain a new PB.
U17 Will Perkin ran hard from 300m out to take a big chunk off his PB and win Race 17 with 1.59.16. Callum Neal (U20) was also in PB form with 2.02.44.
Chiltern interest in the night ended with U20s James McCarthy and Michael Goddard running 1.55.69 and 1.56.35 respectively.
Previously Joanna Lynch and Harry Brandon got a sprint under their belts with 200m times of 32.08 and 30.36 respectively.