I live only 20 yards from Bridge End Startforth. The pub was called the White Swan If you google street maps for uk postcode DL12 9DU you can have a look along the road/river and look up at the front of the castle with the river below from there. I have just launched a free online history walk of the town that comes along BridgeEnd with over 300 old photos, teaser at
https://youtu.be/RMQR4y_hBUo . You can go through it at home or skip to section 3 that takes you past BridgeEnd to the mill that used to be there. The starter history walk link is on the tourism site I put together
www.barnardcastle.org.uk (468k views) which shows photos of the town now including the bridge
For example, the Lord of Alnwick while on horseback attacking the castle with the king of Scotland got shot through the head with a crossbow bolt here. Most kings of England have gone over the county bridge (The attached pic is a visit by King Edward VII, was photographed on the bridge coming back from a shooting party.) and Richard III spent a lot of time here. The bridge used to be a toll bridge and was where illegal weddings took place. There was a murder on the bridge in the 19th C and the victims name is inscribed in the stone. Somebody from BC was involved in the killing of the princes. Here is a video I did with my sister in Law at Bridge End
https://youtu.be/vsz8wSvR2II years ago and the house is currently up for sale so you can see pics of inside..
https://www.rightmove.co.uk/properties/114384488#/?channel=RES_BUYJust 20 yards away is where there was a big national story during covid where our PM's chief advisor Dominic Cummings had a day out here during our strict lockdown (said it was to test his eyes). Geoff