Alastair, the younger brother of GB 400m runner Cameron Chalmers, made the 50-second breakthrough in a three-runner field at Footes Lane at the weekend.
Pictured: Alastair Chalmers is the first 400m hurdler in Great Britain to run under 50-seconds this season in an unusual and heavily restricted campaign. The Powerof10 website records GB athletes’ performances.
The Olympic standard is 48.90, however as a young athlete, Alastair has shown the ability to improve considerably and has laid down a marker for his GB compatriots to try and match when athletics resumes on a national scale.
Alastair’s previous best came last season, when he ran it in 50.07 seconds in Geneva in June 2019.
49.87 for @GsyAla ????SUB 50 ☑️ pic.twitter.com/J32wrPSn0g
— Cameron Chalmers (@CamChalmers400) July 26, 2020
That was a breakthrough campaign for Alastair in which he finished in 4th position at the British Championships last August, narrowly missing out on a place on the podium.
Guernsey is due to host the postponed Island Games next year, while the re-scheduled Olympic Games is due to take place later that summer.
Pictured top: Alastair Chalmers at the end of his record-setting race, the conclusion to which was filmed by his brother and GB 400m runner Cameron Chalmers.