Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
Did you protect your interest with a Declaration of Trust at the time of the purchase?
Was it always agreed by both of you that it was a joint venture?
Is separation a possibility?
How much is the house worth and how much is outstanding on the Mortgage and Loans?
My apologies for the delay
The fact that you are not named on the Deeds on the face of it means that you have no legal interest in the property.
HOWEVER it is clear that this was always meant to be a joint venture and you have clearly been a considerable financial contributor which means that you do have a potential financial claim on the equity - and could make a claim using the Trusts of Land and Appointment of Trustees Act if need be.
You can read more about such claims here
If you were married matters would have been easier as there would have been no doubt that the property was a matrimonial asset to be shared between you
However you need to be aware that the priority will be the housing needs of the children and you may well have to wait until the child is 18 to recover any money from the property.
I hope that this is of assistance - please ask if you need further details