Mining IB London

Hey guys, curious to learn more about mining banking in London, which are the leading groups and what sort of deals do they cover and focus upon. 

I have noticed a couple of the MM banks/boutiques focus on corporate broking and underwriting, is this the case across the bigger groups in Citi/UBS/JPM EPRM or do they focus more on the M&A side of things? 

Would love to learn more about the industry and resources along with it!

Thanks