I think this is the 5th or 6th time the bridge has been hit this year!
Welcome to the Coffee Shop forum, chipbury, and thank you for your first post.
Yes, that poor bridge in our local area must have a claim to being the unluckiest.
CfN▸ .

Poor approach signage at western (A36) side.
Never a problem other way as there is warning just before roundabout before Winsley village, and good visibility of the bridge itself that side.
Basically traffic heading north on A36 approaches Limpley Stoke (road) viaduct and is faced with a sign saying 7.5t if turn left, 18t if carry on along A36, or turn right (with no warning of low bridge).
There is then a warning sign, under multiple other signs just before a narrower stone bridge on a corner. Needless to say virtually impossible to read that far if driving and watching the corner.
Then road runs alongside the railway, this bit had the former Camerton branch, but is now just vegetation overhanging the road. Network Rail could easily erect a warning sign facing the road on their land (but haven't).
Because Network Rail haven't cut the vegetation (and this is where a track was lifted, so quite a few metres from live railway), and allowed it to protrude into the road, it cuts the sightlines of the warning signs on the bridge to about 10-15m before the bridge. The road does sharp corner under the bridge.
There used to be extra deck span for branch track, the concrete pads and different brickwork are clearly visible. It would be easy to install a physical beam in this area (but again hasn't been done, because presumably bridge hasn't been hit enough yet to justify it)
Sort of smacks of safety of bridge being deemed less than cost of extra signs, and a vegetation crew with a battery hedge trimmer to cut the obscuring the warning signs vegetation etc. Cost first, safety second.