If you like to get your information from videos, the Ministry of Justice has launched a family mediation video on how mediation can help separating or divorcing couples sort out their finances and arrangements for their children ( family mediation video ).
Lots more information in video and other forms, with lots of useful links to where you can find help, can be found on Sorting out Separation including children and parenting,health,housing,legal,money and finances,relationships and conflict and work and benefits. When you reach the page, use the slider to the right of the page to scroll down to find all these sub-categories at the foot of the page.