Now stranded at the long-closed Hawes railway station in Wensleydale, it seems she is not all she appears to be, from the internet:-
"The loco is No.12, a 1954 Robert Stephenson & Hawthorn Co. loco that worked at Hams Hall Power Station until about 1970, it's been numbered 67345 which was the last steam loco at Hawes station."

Seen here in July 2018. Now that's not a regular train-spotting place!

The Wensleydale Railway was an ambitious project which eventually linked the east coast and Settle-Carlisle lines from Northallerton to Garsdale. Opened in stages between 1848 and 1878.

https://wensleydale-railway.co.uk/history/

See also
https://preservedbritishsteamlocomotives.com/robert-stephenson-hawthorn-works-no-7845-no-12-67345-0-6-0t/

I was interested to read that some Coal Fired Steam Locomotives were laid up in Reserve in various places around the Country when the railways moved across to Diesel Powered, apparently the reasoning was that if another conflict happened our Oil Supplies (pre North Sea Oil discoveries) would be interrupted a situation that both the R.N. and the M.N. frequently exercised for.
I often wondered why it was that the Floating Crane on the Tees was not converted to Oil Fired with a Hamworthy Rotary Burner with the Bunkers changed to carry Oil.
Oil we may be short of, Coal we had plenty in times of emergency.

The real 67345 was a Class G5 built by the Darlington Works in 1901 and withdrawn in 1955.
Here's a couple of the same class, 67261 & 67323, at South Blyth Shed.

Now those are proper chimneys! Great little workhorses, seen throughout the NE.

The E1/J72 69023 taken at Wensleydale Railway on September 25th, 2016.

See also: https://www.nymr.co.uk/nelpg-69023-joem