** Shares in FTSE 350 bank index .FTNMX301010 fall 1.4% after think tank suggests taxing banks based on their BoE reserves
** NatWest NWG.L down 4%, Lloyds LLOY.L down 3.4% and Barclays BARC.L down nearly 3%, top losers on the FTSE 100 index .FTSE, which has shed 0.18%
** Metro Bank MTRO.L falls nearly 1.3%
** London-listed shares of HSBC HSBA.L and Standard Chartered STAN.L down marginally
** YTD, LLOY up ~46%, MTRO up 35%, BARC up ~35%, NWG up ~29%, vs 30% rise in banking sub-index; FTSE up ~13%
(Reporting by Unnamalai L in Bengaluru)
((Unnamalai.L@thomsonreuters.com;))