The HR1 form is used to register the Matrimonial Home Rights on a property.
This means that a person with a claim for
ancillary relief can object to any dealings
with the property whilst the finances are resolved.
The HR1 can
only be used to register rights on a property that was used as the former
matrimonial home - as I understand it this means that the person applying
must have lived at the property at some stage. Matrimonial Home Rights can
only be registered on one property.
It is possible to let the
property without consent but it is ill-advised as your ex may seek transfer
of the property into her sole name or seek an order for sale of the
property - both scenarios would be frustrated by a tenant on an assured
shorthold tenancy.
If you seek to mitigate any loss from an
empty property you should inform your ex of your intention to let the
property to give yourself adequate protection.
Charles