LONDON (Reuters) – The gap between store closures and openings in Britain’s 500 largest town centres narrowed by 80 percent in 2013 as the economy improved, though 16 stores a day are still closed, according to a survey published on Friday. Analysis by PwC and the Local Data Company found the gap was 371 in 2013, compared to 1,779 in 2012. Last year 6,033 stores closed versus 5,662 openings. The survey found women’s fashion shops, banks, video libraries, travel agents, mobile phone outlets, recruitment agencies and shoe shops were falling in numbers. …