Generally, it is assumed that member states will adhere and adopt ICAO regulations unless they file a difference within their own procedures.
The UK CAA have a number of differences within their own procedures from ICAO and these are listed in the appropriate documents, UKAIP etc.
As for electronic copies of ICAO doc's, they cost a small fortune to buy as hard copies and I've yet to see them available on line without any siginificant charge.