I’m so sorry to hear that.
I’m afraid the news is not good.
You are not married and hence it’s not the marital home and your name is ***** ***** the mortgage. Hence, as the law doesn’t recognise a common-law relationship, you are literally a guest in the house and you can be asked to leave on reasonable notice which would probably be one month.
You may have a financial claim to make against the value of the house if, over the years, you have made any contributions towards it.
You may have a claim against the property if your late partner promised you the house and you relied on that promise to your detriment perhaps by contributing to it or staying with him when you were going to leave or something like that. The legal terminology is Promissory Estoppell. It’s not that common and it’s not a do-it-yourself job. It’s unlikely would be able to use it to stay in the house in the short term would only to get money from it if your partner has children or other beneficiaries who decide that they want the house and want you out.
I’m sorry that it’s not better news.
Can I clarify anything for you?
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We can still exchange emails. Best wishes. FES.