Maybe it's different in England?
To use the Simplified Scottish divorce procedure, you will need to be using either one years separation with consent or two years separation without consent as your ground for divorce.
You will also need to have no children under the age of 16 of the marriage, along with no financial matters.
If you have either of the above, you will be expected to file under the ordinary Scottish divorce procedure, which generally takes a bit longer to complete, however, you can still complete the procedure without having to use a solicitors firm.
In Scotland, there are four grounds upon which to base an action of divorce: Adultery, Unreasonable Behaviour, 2 years separation with the consent of both partners and 5 years separation without the consent.