Playing with water

When I went to fill the bird bath with water this morning from the outside tap it made nice bubbles. An idea started to germinate in my TT mind.
I decided to go for my walk first and of course the sun had shifted by the time I got back.However I carried on in the shade and it didn't go quite as planned.Nothing very sharp.

A fulfilling day at the museum, a day of news and visitors and phone calls when I got home and time has run out. It's now or never so this it.

Have just learned it is a mystery TT. So the mystery of mine is how many bubbles in the bath?