I've tried to photograph it several times and never liked the results. You have the problem that the best vantage point is to the north and you're looking into the sun. Yesterday I tried again. It was a dark, misty day and it didn't matter where the sun was because you couldn't see it.
Those two women (nothing to do with me) came and stood briefly in exactly the right spot. They had two dogs with them- one of whom got trapped in a piece of railing that had been dumped in the river. The younger woman rescued it and carried it to the bank. There used to be a footbridge where the rocks in the foreground are but it has disappeared since my last visit. The women were wearing gumboots and waded across. I wasn't- and had to take the long way round- across the aqueduct itself.