Why Flintoff captaincy is under question

Is Andrew Flintoff the right man to lead England? Angus Fraser provides a few points to ponder:

Many will feel that Flintoff is the automatic choice, but the decision of who should lead England against Sri Lanka is far from straightforward. Duncan Fletcher, the England coach, continues to air concerns over the workload placed on his most important player, and the first thing he, David Graveney and Geoff Miller need to assess is how much longer Vaughan is likely to be out.