Blisworth tunnel will be closed to traffic from 07:30am, possibly until 09:00am on Thursday 25th June for the passage of four widebeam boats travelling, with two boats travelling from Stoke Bruerne to Blisworth and the other two boats, Blisworth to Stoke Bruerne.   Boats may enter the tunnel if directed to do so by a Trust representative at the tunnel portal, or after 08:30am, if no representative is present.