Will your ex agree to an uncontested divorce? I think costs can escalate, especially of the ex is being difficult. A friend of mine is spending quite a lot, but her H is using the divorce to drain her savings.
You can get 30-60 minutes free consultation with some law firm - lots come up on google. Sorry you are going through a difficult time.
Is there any reason she doesn't do this herself. It really isn't difficult. Fill in the divorce petition and serve it herself. There are step by step instructions all over the web, especially Wikivorce. No need to have her savings drained. The only cost will be the court fee (Â£410 I think ) As for service, send petition and statement of arrangements for children, if there are kids between them copied three times to your local county court and they will send all appropriate paperwork to STBEX . I did this 5 yrs ago, 3 kids and tricky ex who didn't want to be divorced.. but I certainly wasn't going to waste what little money I had paying a solicitor to fill in forms I was quite capable of filling in myself.. same goes for financial settlement. Solicitors don't make the decisions, Judges do. Follow the steps, go to court and put your case... most Judges have seen it all before and can see if someone is trying to 'get one over'..I promise you it really isn't hard. Good luck.