If you don't have the 3000 pounds to pay IMMEDIATELY they will seize the entire property and auction it to raise the funds. The balance of equity is not even relevant to the gov't.
If you do not vacate the home when ordered they show up with law enforcement officers. If you do not then vacate, the officers will pull their weapons and remove you by force.
The gov't will show up with armed men in order to remove 90 year old woman from her home so that they can sell it and keep the proceeds, all because her husband has died.
That is how gov't works.