finacial settlement

I have been seperated for 18 months and (despite my adultery) it is unlikely that my husband will agree to divorce me until 5 years have lapsed.
We are trying to (amicably) sort out our finances (not !) Can someone tell me that if we come to an arrangement on our finances can we make that legal and ie then not have any claim on each others future assets (eg if one of us won the lottery, or came into some money) even if the divorce is dragged out to 5 years?

Option (1) if your H will not agree to a divorce and you want one before the 5 year rule, you can use the unreasonable behavior rule.

It is not too difficult to find some elements of a spouse’s behavior to find intolerable to continue living with, and the courts do not require extreme examples.

Option (2) If H will agree to a legal separation, and then finances can be sorted out prior to divorce

Thanks for that.
Does a legal separation mean tat is the end of the matter, or if I did win the lottery for example, would my s2bx be able to claim half, until we are divorced

Finances can be sorted out during the process of legal separation, once sorted and ratified in court, there is no claim against either party, unless it could be proved that either party had been evasive in the original settlement.