On a rainy evening, a Stanier 8F makes it through Skipton yards with an anhydrite goods train... with a Fowler tender dragging behind it. I remember seeing a picture of an 8F with a Fowler tender, and although I am not entirely sure if it was photoshopped or real, here's my take on it.
I'm pretty sure a lot of them did SRKing. Almost every LMS Standard loco carried one at some point (except the Duchesses and Princesses) the Black Fives, Jubilees, Patriots, and Royal Scots all had them. Of course they all got swapped out for 4000 Gal Stanier Tenders once they were available, but some Patriots and Jubilees kept theirs for a good while after. Similar situations happened on the Southern Region with Maunsell's 3500 Gallon and 4000 Gallon tenders.