for the biggest business stories. hopes of a european mega exchange between london and frankfurt are fading fast. the london stock exchange says the regulatory hurdles are too high. nokie hopes to revive its flagging the classic 3310. we ll get a hands on preview from the mobile world congress in barcelona. welcome to world business report. i m sally bundock. in a minute, we ll look at the potential collapse of the merger between the london stock exchange and deutsche. but first: the clock is ticking, with speculation mounting the uk prime minister may trigger article 50 on the country s departure from the european union in early march. since the referendum, there have been major concerns in london it could lose its position as europe s financial capital. but one of germany s most senior central bankers tells us why he believes the city will retain its crown. at present, britain benefits from so called passporting rights which allow uk based banks free access to the europea