A 29-year-old man from Cosham, the driver of the Ford Transit, has now been arrested on suspicion of causing death by dangerous driving.
The man has since been released from custody but remains under investigation.
Hampshire Constabulary have thanked the public for their support during the investigation but are still appealing for witnesses to contact the police – particularly anyone who may have dash cam or CCTV footage.
Anyone who can further help investigations is urged to call 101 and quote reference 44200230693.
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