By ITV News Wales Correspondent Rupert Evelyn
Police were alerted to a "drunk man" in a van in Cardiff which matches the description of the vehicle that was driven into people in Finsbury Park a day before the attack, ITV News has learned.
Officers in South Wales were on the scene in the Welsh capital within half an hour of receiving the report of the man lying across the van's three front seats, seemingly passed-out.
It is not yet known whether South Wales Police spoke to the man, who is believed to be Darren Osborne, or whether he was still in the van when they arrived in the early hours of Sunday morning.
What does concern some is the suggestion that police may have had some form of contact with Osborne 24 hours before the attack outside the north London mosque, for which he has been arrested.
Police have confirmed they were called to a van in the area where Darren Osborne lived approx 24 hours before the Finsbury Park attack.
A South Wales Police spokesman said: "At 12.27am on Sunday 18th June South Wales Police responded to a call made to the non-emergency 101 number following a report of an insecure van parked on a street in the Llanedeyrn area of Cardiff.
"Officers attended, a male was asleep inside the vehicle, which showed no signs of having been driven recently.
"The officers’ assessment was that no offences were disclosed."