You have no legal interest in the property, but may be deemed to have developed a beneficial interest if you have lived with your partner for a number of years and have regularly contributed to the mortgage and joint household expenditure.
Your IP will need to present your proposals on the basis that you have no interest in the property, and hope that creditors acccept this argument. If they do not, and you decided to go bankrupt, then a subsequent Trustee may pursue a beneficial interest claim against your partner - but will need to prove his claim by producing satisfactory evidence in support.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk