It is useful if your solicitor, before presenting a petition to the court, can write to your spouse if your spouse has not yet instructed a solicitor.
The letter will invite your partner to consult a solicitor so that as much agreement on all the issues can be reached before a petition is filed.
If such a letter can be written, it is obviously preferable for the respondent to receive this preliminary indication of his/her spouse's intention rather than suddenly receiving a formal and threatening petition.
Alternatively, if your spouse has already consulted a solicitor, it is useful for your respective solicitors to discuss matters in order to try and take the heat out of the situation and obtain agreement on as much as possible before a petition is presented to the court.
Discuss with your solicitor the basis on which your divorce petition will be presented to the court.