I work at a TOC now, but also worked for a FOC for around 25 years before I moved.
Out of my depot, I'm the only one that has ever done Single Line working on a regular basis, Temporary block, gone backwards, forwards and sideways!!!!. Possessions, hot axles, locked axles, wheel skates, fire, assistance, breaking down and waiting for assistance in the rain!!!!. Also, I've been asked to do some weird things not in the rule book, to get Network Rail out the ****.
I can recall a few years ago, that some TOC's wouldn't entertain us, because of the class 1 work.
I love my rules assessments....I've even corrected my driver manager!!!