Aldwark Bridge closed for repairs yesterday (15/06/2020) for approximately 8 days. It has been suggested that cyclists may still be able to cross at times, but apparently this wasn’t the case on the first day of the closure.
If you need to cross the river here, a footpath of about 1km length on the west bank of the Ouse links Aldwark bridge to a footbridge over the river, bringing you out in Aldwark village, on the bend near the church.
The footpath doesn’t appear on some past OS editions, but is on the current map.