Sorry, Will, I linked that photo as it was already in my album. I've posted another, which is an early publicity photo of one of 01's sister engines. What's "LOS"?
Yes, the 13 class are probably an acquired tatse for someone brought up on North American steam. They are a rebuild of a tender engine, which may go some way towards explaining their quaint appearance. They were however, sprightly performers, even in their old age.