Let's face it, HMRC aren't backwards at coming forwards about getting the money they owe, so I hope for those kids sake that Creepy bollocks has a plan to pay his taxes. HMRC can't take their home, but they can take any possessions and sell them to go towards the tax owed. However, if they don't have enough money to pay the mortgage (and there is no way they will if the views keep heading downwards) then they are going to have to sell.
Neither Creepy or Lazy will be able to find a job that will pay enough to pay for that mortgage, living costs for a family of 7 and a tax repayment plan. I think they are paying anywhere between £1500 (interest only) to £3000 repayment for their mortgage. These are very rough figures and will be even more if they have gone with a lender who deals in risky loans, which we know they have.
It wouldn't surprise me to see a GoFundMe for them to keep Mingham mansion, begging their hardcore 40k fans to donate to the fund, but if I were them I would be careful about doing that because the tax man could see that as income and use it to pay off their taxes.
Tick tock Minghams, the tax man won't wait!