Kweku Adoboli, a London City trader who's scam cost Swiss bank UBS £1.5bn has said that banks have not learned lessons from the financial crisis because he believes that bosses avoided jail-time while more junior employees took the blame.

When asked by the BBC if a similar scam could happen again he replied "absolutely."

He says that employees face pressure to make profits "no matter what" - and this culture is not changing as firms continue to try to maximise profits.

When Mr Adoboli was jailed in November 2012 police described his operation as "the biggest fraud in UK history."

"I think the young people I've spoken to, former colleagues I have spoken to, are still struggling with the same issues, the same conflicts, the same pressures to achieve no matter what," Mr Adoboli said.

"And this goes back to the structure of the industry. People are required to take risk to generate profit, because yields in the industry are consistently compressed," he continued.

The 36-year-old faces deportation to his native Ghana, he has lost his appeal against deportation. He is living with friends in Edinburgh and speaks for free at banking compliance conferences.

"But from a politics angle, the desire is to limit that risk taking, to limit the profitability, but you have these conflicted goals," he added.

He warned that financial instability will add to the pressure on workers: "And where the conflict comes is where people fall into this grey zone, and so I think it can absolutely happen again ... Especially as we go into what could be the next phase of the great financial crisis over the next 12 to 24 months."