Plusnet Call Protect - where is the detailed guide

[#1]

Re: Plusnet Call Protect - where is the detailed guide for using this.  
Is it a BT managed list or who manages the default call blocking?
Is there a detailed guide to enable subscribers to block countries etc or to use * #  wildcards to block certain std or international callers.
is there a limit to number of digits.
Does the user's blocked number list accept non-assigned (spoofed) CLID numbers.
Can the system compare the callerID with the Automatic Number Identification ANI,  and block numbers that are clearly spoofed.

[#2]

Call Feature Guide linked from your Plusnet Telephone Control Panel: https://www.plus.net/help/phone/call-features/

[#3]

Keep scrolling, and beware of the leopard.