I have a suggestion, something that i have picked from another software and found it very helpful. When creating a new category in nominal accounts, there is an option to specify the VAT rate for it. Just like when you group it under a particular expense heading i.e. Overheads, direct expenses (also add option for VAT)
This way 99% of all expenses entered will have automatic VAT rate against it. This really helps to make the VAT return more accurate.
The permanent nominal accounts should already be grouped into standard or zero rated (no VAT) categories.
For non-VAT registered users, the VAT will not affect the accounts as the VAT settings will not have VAT registered.
Its a handy feature, hopefully others will agree.