As a spam flying over here - always trying to comply with the UK rules & instructing our younger crews on some of the differences between US & UK ATC - where might I find a copy of the ATSOCA??
We carry RAF FLIP products, maintain UK AIP, & part of our indoctrination is specifically going over RAS/RIS/FIS and other equally challenging things for us Yanks, but more source documentation & less word of mouth is always helpful!
In fact, I'm scheduled to give a brief to our flying squadron in the next few weeks covering exactly these topics + UKLFS - whilst I feel I have an above average (for a Yank) insight into said topics having been fortunate enough to be on exchange with the RAF previously, I do not consider myself an expert. We have, in the past, coordinated for ATCOs to brief us & will continue to do so getting the expert info to the crews - I'm just a poor fill-in this time around!