It is important to remember that divorce proceedings themselves will deal with all the aspects of the family on divorce:
(a) The proceedings for the divorce leading to a decree of divorce;
(b) Agreement or dispute as to custody and access;
(c) Agreement or proceedings relating to the financial issues.
Each of these three aspects can be agreed upon before the proceedings for divorce are commenced, thus ensuring that the agreement with regard to the arrangements for the children and the financial agreement can both be dealt with in court orders shortly after the pronouncement of decree nisi.
If no agreement can be reached with regard either to the custody of or access to the children, this will have to be dealt with at a later date by the court.
Similarly, if no agreement can be reached on a suitable financial settlement this will also have to be dealt with by the court at a later date.
If agreement has been reached between you and your spouse on all issues and you have checked those agreements with a solicitor, there is no reason why you should not deal with the mechanics of the legal proceedings yourself.
Every county court with divorce jurisdiction will be able to supply you with the appropriate forms and explanation of the procedure. If you live in central London the forms are available from the Divorce Registry.
/divorce/doing-it-yourself/The-procedure.html... see: How to handle your own divorce proceedings - The procedure