No, no you don't, and I also think it's cheap, bearing in mind professional co's do not mark this up, it's often paid direct by the customer to the local force, why should the public pay for the police time for admin alarms?
The payment is for the administration process, it covers a plethora of things.
http://www.securedbydesign.com/security-systems/Security-Systems-Policy-2015.pdf
People fear the inspectors, remember they want you to be successful, it's in their interest so ask lots of questions regarding advice and best practice.