UK Landlord Forum / Life

My partner and I will be looking to buy a property together very soon. She will be a first time buyer and we intend to live in this property and to make it our home. I will provide a 50% deposit and she will take care of the mortgage payments. I know that warning bells be ringing, and I realise that certain risks will be taken, but surely some legal arrangements can be drawn up to at least "half protect" interests.
Is it possible that the mortgage is purely in her name but ownership is in both names, or will I have to accept that the mortgage is joint and take responsibility, on paper, for the payment?
I hope I've explained the situation clearly enough to understand. We've been together through thick and thin for over twenty years now. I feel relatively safe with the situation, but as we all know, things can always go tits up and I want to secure both our interests as much as possible.