Cohabitation

Hey guys,

I have a mortgage and would like for my partner to eventually live with me. She won’t be paying anything towards mortgage as I don’t want her having equity in my property.

She will just pay half of the bills, and put money aside for when we decide to purchase a home together in future.

What bills can she pay half of? Electricity, gas, water, wifi, council tax?

Would any of these count as her paying towards mortgage? As this is something I’d like to avoid.

Many thanks all!