Chelsea and Arsenal's expected failure to reach the Champions League last eight could mark a low ebb in English footballThe vultures are beginning to circle over the stumbling, disorganised remnants of Premier League participation in Europe's major club competition, waiting for the moment when life can be pronounced extinct and the bones of a once thriving enterprise can be picked clean, probably prior to being danced over.In case you haven't heard, should Arsenal and Chelsea fail to overcome their first-leg deficits against Italian opponents when the Champions League resumes next month, English football will not have a side in the last eight...