When we bought our house, since I had just been made redundant and could not get a mortgage, I borrowed from my family around 170K. I have receipts of the transfers and 2 private deeds (where we state how much and when the money should be repaid, signed by both) with family members abroad.
The wife is claiming the money is mine and she should be entitled to half of it.
I am preparing form E, what other info are needed to prove that I have debts against the property?
Unfortunately loans from family members are considered "soft loans" which means they usually are not taken into account by courts because they can be paid back whenever.
As long as you have the documents to prove that you both signed and get sworn statements from the family members that loaned you the money and if need be ask the court if they can be called as witnesses, then hopefully it wont be a problem and fingers crossed a Judge will consider them and take them into account.