So basically the Lease Agreement is still in affect (hasn't been terminated by mutual agreement, by the end date or by the tribunal).
Even know your not living in the house, you are still legally liable for meeting the terms of the Lease agreement, i.e. paying rent, keeping of grounds etc. Sucks I know, I've been in the same boat where I paid rent for 2 months after I left (before the lease ends).
I take it there has been a mine shutdown in the town so renting out the property is almost impossible, even if you offered to pay relief to bring the weekly rent amount down?