Thank you for your response.
You do need to find out the value of your pension as this will make a difference as to how you go about dividing assets.
You marriage is a medium lenght marriage and the court will want to try and reach equality between you and the courts main purpose is going to be to meet both your housing needs for the furture.
As there is £400k equity this should be sufficent for the property to be sold and you both downsize to smaller properties.
As the house was paid for by your husband and given your marriage was a medium one the court will favour that. If tis possible to buy a 1 bedroomed property for say £100k then the court will likley order this for you but its going to depend on the property prices in your area and what is available so you will need to have a look.
When you have your pension pot figure this must be disclosed. If the pot is a small one then it might be that you offset this by having less of the house monies to retain your pension. It is going to depend on what the figures are.
There is no set rules, which you may have appreciated from this answer but the court will want to meet both your needs moving forward so it will depend on factors such as the prices of available housing to rehome you both.
There are stages to dealing with the matrimonial finances: first is full diclsure then dicussions can take about division and meeting needs.
You should consider referring to mediation. This is actually a prerequisite befor you can apply to court in relation to the matrimonial finances upon divorce.
Mediation is independant and will try and help you reach agreement without the need for court. Google family mediation in your area and give them a call to self refer.
If agreement can be reached at mediation then this should be drawn up into a consent order and submitted to the court for approval when applying for decree absolute. If approved this will become legally binding.
If agreement cannot be reached then the mediator will sign the form that you need to apply to court.
Let me know if I can assist you further
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