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Portholme is a 106-hectare (260-acre) biological Site of Special Scientific Interest in the Parish of Brampton between Huntingdon and Godmanchester in Cambridgeshire, England. It is a Nature Conservation Review site, and a Special Area of Conservation.
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It delivers a fast and flowing layout that suits developing and experienced drivers. The track includes a mix of high-speed corners, challenging chicanes, and heavy braking zones—offering great overtaking opportunities and rewarding precision. Its flat but open design also provides excellent visibility for drivers and spectators alike.