I was last sunday on the trip to Cullinan, and before and after the trip I shoot some pictures of the engines standing there. Now, I would need the numbers of these engines:

Here, the number is clear (15080), but which class is that?

... a 15F, I suppose, but which one?

Looks quite similar like "Jo-Anna"... An other 24?
And last but not least:

Which class is that? And, is the vehicle number anywhere visible on the front?
With much thanks,