I did think of asking for 'Iron Age' subjects but I know how difficult it would be for you to choose, Hilldodger!
The next challenge is simple enough (
):
Water and its relationship with a man-made object (don't chuck your bike in the drink though!)
The weather is changing, slowly but surely. The weekend is coming with welcome light. Diana's fountain? Brunel's Iron? Your garden pond? A bridge over troubled waters, or down and dirty in the gutter?
Simplistic example:
Closing date - say, Monday 9pm.