The Severn Valley railway is about to start a trial where you can buy a standard railway network ticket to Bewdley which is then valid on the SVR on special purpose trains for the Kidderminster to Bewdley section; some of those will be steam. I think if that trial becomes a permanent operation it would count.
https://svr.co.uk/news/heritage-trains-to-carry-commuters-as...
Yes, and the UK's industry body - Rail Delivery Group - has thoroughly screwed up distribution of the timetable data for this trial... so no online retailers (with the exception of BR Fares) will be selling tickets for the operation. Hardly a fair trial.
Yes, though I think it's being positioned as a commuter service for the people of Bewdley to get to Birmingham and back rather than for visitors to get to Bewdley.
Does the line still pass the giraffe enclosure? It's been a few years since I was on it. Around 12 years ago it was the elephants.