Bursledon and Putney respectively. Unfortunately their cameras are better than my mobile phone so I apologise for the image quality.
It was cold but worth it for the clear, cloudless sky and mirror-flat water.
And on the way back we passed a duck punt, complete with bloody great cannon on the foredeck, being rowed VERY SLOWLY down channel. It looked familiar...so later I scrolled down Adrian Morgan's blog Something About Old Boats and there was one so similar it could be the same.