Why didn’t the British steam locos use Corliss valve gear?

[Matthew T]

My understanding is that it’s incredibly efficient and very common in stationary engines. For the record, it might’ve happened outside the UK but I kind of have to ask in one place at a time.

 

[randyrippley]

Can you show us any locomotive that used Corliss valve gear?
It only appears to have been used on stationary engines

reading the wiki article at https://en.wikipedia.org/wiki/Corliss_steam_engine
two immediate problem become apparent:
1) difficulty starting
2) it seems it was really only suitable for constant speed engines.

I would hazard a guess that integrating the valve gear onto multiple cylinders would be a problem