Schedule of loss

How do. Just retired bloke, man of many talents. Had to relocate away from my two sons because of ex's harrassment.
Spent almost exactly 20 years cohabiting. My ex had many problems - financial, health, depression, being bullied, and more.
Because of her debts I always paid my way in cash - she didn't want my money showing in her bank account.
After receiving her pension, only three years ago, she improved the home. Before that I had paid for and installed all the improvements for 18 years.
She started repeating the mantra 'I have everything, you have nothing', as her mental health problems resurfaced.
I was still prepared to help her through it all until she tried to strangle me. (Trying to get me into a rage to have a reason to have me removed. i wouldn't go for it.)
Stupidly she still rang police. However they believed me and arrested her. (No charges - no independent witnesses)
I had to leave home for my own safety, so she got away with it.
I'm up to the schedule of loss stage of court, and struggling with this bit if anyone has examples or advice?
Just gone two years, I'm asking for around one sixth of the house value but her problems mean she can't face reality. She'll fight and lie until we are both up to our ears in fees.
However, she signed me as sole beneficiary in her will in 2003 and to receive her NHS pension, should she die, in 2017.
Doesn't this prove my case to be able to claim a small, unequal stake in our home?
Ta.
Stand up Guy.

If you weren't married and the property was in her sole name, you have to prove beneficial interest.

Your contributions will need to be evidenced in some way. Have you got evidence of cash withdrawals, paying in slips etc? Can you ask her to provide evidence that she paid debts etc if she's claiming she did? Similarly can she evidence paying bills??

As this is a property law matter I am afraid we can provide only limited support. You really need to talk to a property law expert.

Hadenoughnow