As the poster has confirmed that his girlfriend does not pay anything to the household bills, and they have only lived together for a relatively short period of time, it would be extremely difficult to prove that she has developed a beneficial interest in the property.
I draw from my years of experience in acting as a Trustee in bankruptcy when I have attempted to recover monies for creditors under similar circumstances, and to be frank a claim from your partner's Trustee (were she to enter bankruptcy proceedings) would be pretty hopeless.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
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