Investigatory Powers Act - Government mandated backdoors

I assume the list has seen  
http://www.theregister.co.uk/2016/11/30/investigatory_powers_act_backdoors/  
?

Mandatory notification to HMG of system architecture changes/patches  
which might impair the ability of the security services to snoop and  
decrypt customer data.

Other than making the UK a place the EU probably won't allow data to  
be processed post brexit (or even pre-brexit), what are the views in  
this forum of the practicability of this, and the probably impact to  
the UK as a whole - especially given the hugely broad definition of  
"Commmunication Service Provider"

Paul