I'm not sure it covers bonk-keeping, whatever that is!
Have you read the page about it on this site (www.book-keepers.net/network-pii-scheme)? It says it's based on a fee income of £15k, so not a lot. If you look at the proposal form, there are boxes for the percentage of income from various types of work, so I assume it will cover all of these, but I doubt many people will do much of the risky stuff for an annual income that low.
The easiest way is to complete the proposal and see what they say. They're pretty quick to respond.