Could be the worst year in tescos history. Yanis varoufakis says greece and its creditors are narrowing their differences. A european official says the deadline for the reform to unlock funds is now in june. Welcome to countdown. Coming up, the concoction that could make you invincible. A former executive says the key behind brain function is butter in your coffee. That story later on the. Futures trader out of a suburban house has been arrested in london and charged in the u. S. With 22 criminal counts relating to the 2010 flash crash, which went 1 trillion from the u. S. Market on may 6, 2010. He is due to appear for an extradition hearing at westminster magistrate. We are outside his house in hounslow, good morning. What do we know about this man . Ryan we are learning quite a bit. He lived in this neighborhood, it would appear, with his family in west london just beneath the flight path to Londons Heathrow airport. He was presumably arrested around 12 30 yesterday. What we know is