Bearing in mind that there are two dependent children, that there is not enough equity to provide homes for two people if the house is sold now and that your wife very likely couldn't get you released from the mortgage anyway I think it is quite likely that the house will be transferred to your wife with a charge in your favour for a percentage of its value. However, you will not be able to force a sale and realise your charge until one of various trigger events which are typically your wife's death or remarriage or the youngest child ceasing to be dependent. On the figures you have given I doubt that any other solution is practical.
Pensions are a separate issue. On the face of it your wife is entitled to half the pensions which have been built up during the marriage.
You and your wife could agree some sort of different outcome but I think if a court had to decide this that is how things will go.
I don't suppose this is what you want to hear but if you think about the figures in your case it is hard to see any other outcome. Your wife's need for a stable home for herself and the children will carry a lot of weight in the context of figures like these.