Hi enquirer and welcome to the forum
If you are going to be going bankrupt shortly, I would leave this to the OR and your mortgage company to sort out if you are intending to vacate the property. The keys will need to be handed back to the mortgage holder, so that they can eventually arrange to sell the property.
If you are intending to move into private rented accomodation, it may be better to do so before you declare yourselves bankrupt in order to prevent adverse credit checking. If you have no choice but to seek council assisted housing, it would be better to wait until the property is subject to possession proceedings, as if you vacate it on a volutary basis this may affect your position on the housing list.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
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