Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
How much was the house worth and how much was outstanding on the mortgage?
Who owned the property and what is your current accommodation?
What financial contribution did you make to the property (and please confirm that you were never married to each other)
How much would a cheaper two bedroom property in the same general area cost to buy?
When you were together did he ever make any promises that you would have share of the property?
From what you have aid to me you have no real claim on the money form the property.
You do have a potential claim under Schedule 1 of the Children Act for a capital sum sufficient to purchase a house for you and your child - which would revert back to your ex when your child is 18 or if you cohabit.
There is in fact no time limit on such a claim other than the 16th Birthday of your child
In addition the claim is NOT linked to the house itself - it is about the housing needs of you and your child.
I hope that this is of assistance - please ask if you need further details