BLACKBURN, England, April 17 : Coventry City ended their 25-year absence from the Premier League with a 1-1 draw at Blackburn Rovers to secure promotion from the Championship on Friday. Needing a point to make it mathematically certain, Frank Lampard's league leaders salvaged a draw as Bobby Thomas heading a late equaliser at Ewood Park. Blackburn had taken the lead shortly after the interval with a deflected shot by Ryoya Morishita. The final whistle sparked celebrations on the pitch and