One possible scenario would be an expansion to what's currently happening in the US, a massive infrastructure sell off.
And, given that there is no British Soverignty any more I'm sure your debtors will approve a fire sale of Britain.
If your going to borrow money to give your bankers then sooner or later the people you have borrowed from will want paying, and if Europe can make money from flogging off Britain then they will.
It's good to see that Britain has it's sharpest minds negotiating a great deal ( For someone )
http://www.economyincrisis.org ... nds-buying-infrastructure
Middle Eastern countries have taken their oil profits and created  sovereign wealth funds, which Taibbi compares to the most aggressive  Wall Street hedge fund on steroids.  Those funds, armed with trillions  in cash reserves, have sought to stake a claim in America through  investments in infrastructure.
 Those funds have either purchased or tried to invest in everything  from the Pennsylvania Turnpike to parking meters in Chicago, Pittsburgh,  Nashville and Los Angeles to toll roads in Indiana.
 In fact, some experts have concluded that by 2018, those sovereign  wealth funds could invest as much as $15 trillion in American assets.  However, the true number may never actually be known because of the  secrecy involved with the funds.  Oftentimes, the lawmakers that must  approve the purchases have no idea who the real investors are.
 “This is a process of a country systematically divesting itself of  bits and pieces of its own sovereignty, and it's taking place without  really anyone noticing it happening — often not even the people asked to  vote formally on the issue,” Taibbi writes.