If you are still on speaking terms I would suggest mediation as a starting point.
For the simple reason that you will both have a role in shaping the agreement and as such this can lead to positive results.
The Mediator is an impartial third party who can help both of you to find solutions.
Legally speaking 50/50 is the STARTING point but what is more important is where you end up. This will depend on the circumstances. These vary from case to case, which is why its very difficult to state up front what you can expect because you can not guarantee the actions of your spouse/their solicitor.
What starts out as a amicable divorce can become contentious very quickly and often for the smallest of reasons.
More importantly with court orders you are asking a third party to make a decision and again there are no guarantees, the pendulum can swing both ways and people are rarely satisfied with the results.
If possible court should always be the remedy of last resort.
If you go down the solicitor/court route you will essentially be depleting the 'mutual pot' that will enable you both to move on to the next chapters of your lives.
The following are helpful guides to mediation and I hope that they are of use and make things a little clearer.
www.advicenow.org.uk/guides/survival-guide-using-family-mediation-after-break
www.advicenow.org.uk/guides/survival-guide-sorting-out-your-finances-when-you-get-divorced
www.familymediationcouncil.org.uk/
www.gov.uk/money-property-when-relationship-ends