Lassoing the Circle

Yesterday I happened to find myself on the "old" Circle Line for the last time. Travelling from Bayswater to Baker Street I found myself assisting various bemused tourists who (quite understandably) were trying to match the freshly applied maps and route diagrams with the old service, and failing. Maybe delaying application of the new maps until Saturday night would have been too difficult, but surely a note could have been added beside the "new" route section to give the start date?

Trying to describe the new shape of the Circle over the phone a few days ago, I suggested it looked rather like a lasso. It seems I am in good company according to the Evening Standard - really how could anyone suggest it resembles a tadpole?