LONDON —There was a time perhaps three or four years ago when the Premier League seemed to split into two groups. There was the top seven, who would contest the European places, and there was the bottom 13 whose first thought each season was simply to avoid relegation. That, perhaps, has changed now.A clear top six remains, probably itself with a subdivision into a top four, then Liverpool and Tottenham. The bottom chunk has now subdivided, creating probably seven or eight teams who should be relatively safe, and a scrap for the three relegation places between six or seven teams.Such is the gulf between Premier League and Championship that the three promoted sides will immediately be under pressure. Leicester City and Sunderland, having produced remarkable late surges last season to avoid the drop, must anticipate another season of struggle. Aston Villa and Newcastle United also found themselves in the dogfight last season and both could get sucked in again.Two of the promoted sides, Bournemouth and Norwich City, have exciting young British managers. Eddie Howe is only 37 years old and played for Bournemouth between 1994 and 2002. The young manager returned after two years for another three seasons and became…