The value of the matrimonial property to be shared are all the solely and jointly held assets, including pensions and excluding assets held before marriage, gifts and inheritances, minus any liabilities. Assets held before marriage, gifts and inheritances are non matrimonial but are relevant and depending on the circumstances may be shared too. Where the assets came from is less relevant as time passes so after 33 years everything will almost certainly go into the 'pot.'
Then in a nutshell the pot is then shared according to a checklist of factors in s25 Matrimonial Causes Act 1973 and usually 'needs' comes at the top or very near the top of the list. To be deemed ' fair' and reasonable a settlement should be within the s25 criteria.
If you currently live in the former matrimonial home perhaps your husband is looking for a share of the equity???