YOu can''t get a financial order but if your husband will agree you could get a Separation Agreement. In England & Wales a separation agreement is treated differently from a commercial contract but if there is full disclosure, both parties take legal advice and the agreement is fair (complies with law) it will carry considerable weight and the courts may turn the agreement into an enforceable order later on.
If your husband is being difficult agreeing could be problematic and the disadvantage is you would need to pay for the drafting of a Separation Agreement and then a court order later.
LMM, my understanding is an order can''t be effective until after the Nisi. s23 MCA 1973 states;
(1 )On granting a decree of divorce, a decree of nullity of marriage or a decree of judicial separation or at any time thereafter (whether, in the case of a decree of divorce or of nullity of marriage, before or after the decree is made absolute), the court may make any one or more of the following orders ...
When there is pension sharing the order doesn''t come into effect until the absolute.