£340
The only ground for divorce is that the marriage has irretrievably broken down. There are five ways, known as the five facts, of demonstrating that the marriage has irretrievably broken down. One of the following has to be proved:-
1. Adultery
2. Unreasonable behaviour
3. Desertion - Desertion must be for a two year period against your wishes without justifiable cause. This particular reason is seldom used these days.
4. Two years separation and both parties consent to a divorce
5. Five years separation when only one of the parties consents
http://www.wikivorce....tion-For-Divorce.html
... that page states £300, but it went up to £340