Centre.

Plan A today seems to have work.  This is Maryport harbour and my theme for the day was geometry.  Wherever you look there are examples.  The weather was sunny and warm.  The tide was on the turn, but there was still loads of mud to see and road cones that had been mud covered.  And here you see an example.  A gull sitting roughly in the middle of a tyre as it was his own swimming pool.  No this isn't a Photoshopped photo-it's the real thing.  I couldn't resist this shot-it gave me a smile, anyway.