Re: Who is a csp?
Cheers, Adrian Kennard has done a great job of trying to cut through the crud to get some sense out of this: though the comments there are essentially asking the same question: at what stage does it stop?
At the moment there seems to be no real answer, as a CSP seems to be defined as anyone providing internet connectivity to an end user, or at least everyone from the first layer of NAT onwards:
http://www.theguardian.com/world/2016/jan/13/snoopers-charter-theresa-may-cafes-wifi-network-store-customers-data