JHR Developments has confirmed that Bart Harrison will join the team as it expands to three cars for the remaining two meetings of the GB3 Championship season.
The 18-year-old has been competing in the E4 and Italian F4 Championships this year, with a standout third-place finish at Monza among a series of top ten results across both campaigns. He also raced in the Formula Winter Series – with two podiums – and claimed two wins and a podium in a one-off appearance in the Formula 4 CEZ Championship
Bart made his single-seater debut in British F4 last year, immediately making an impression with a Rookie Cup victory in the second race of the season and going on to secure a further eight podium finishes across the campaign.
Prior to that, he twice finished runner-up in the British Karting Championship – in IAME X30 Junior and Senior – and became the only two-time winner of the IAME Winter Cup in Valencia, in X30 Junior. He also proudly represented Great Britain in the FIA Karting Academy Trophy.
The Yorkshire-based racer will join team-mates Noah Lisle and Kai Daryanani in the GB3 Championship at Donington Park on 4–5 October and at Autodromo Monza on 18–19 October for the 2025 season finale.
Bart Harrison: “I’m extremely excited to be joining JHR Developments for the final two rounds of the GB3 Championship. This will be my first experience in a car of this speed and performance, and I’m eager to learn as much as possible from the team and my team-mates. I know the team has a great track record of helping young drivers progress and I’m confident that, with their support, I can make a positive impression at Donington Park and Monza.”
Steven Hunter, Team Principal: “We’re very pleased to welcome Bart to the team for the final two rounds of the GB3 Championship season. He has shown that he has a huge amount of talent and potential and, while GB3 is a big step up, we have no doubt he will adapt. We’re looking forward to working with him and helping him to maximise this opportunity.”
11 September 2025
