By Frank Dalleres London-based R3 Sport, a management company set up by Redwood Bank founder Jonathan Rowland, has emerged as a bidder for British Basketball League champions London Lions. London Lions, the reigning champions of both the men’s and women’s BBL and the most high-profile team in the UK, have been placed in administration following the collapse of 777 Partners’ sporting portfolio. R3 Sport has made an approach to administrators Hudson Weir ahead of Friday’s 12 noon deadline for formal offers, sources close to the talks told City A.M. London Lions are expected to fetch around £2m a…