...OVERVIEW + As the U.K. heads toward its March 2019 exit from the EU, it retains its key credit strengths: its high average income levels, diversified economy, strong and independent institutions, and the reserve currency status of sterling. + However, uncertainty persists regarding the U.K.'s future relationship with its most important trading partner, the EU, and whether a transition period will come into force when the U.K. leaves the EU on March 29, 2019. + We are affirming our long-term sovereign credit ratings on the U.K. at '##'. + The outlook remains negative. RATING ACTION On Oct. 26, 2018, S&P Global Ratings affirmed its unsolicited long- and short-term foreign and local currency sovereign credit ratings on the United Kingdom at '##/A-1+'. The outlook is negative. At the same time, we affirmed the '##/A-1+' long- and short-term issuer credit ratings on the Bank of England (BoE) and the '##' ratings on the debt programs of Network Rail Infrastructure Finance PLC, The Channel Tunnel...