Lost black Nike swim bag containing swim goggles and a green towel at Derby swimming pool.

I lost my black Nike swim bag while I was at the Derby swimming pool yesterday. It has my name on a tag inside, along with my swim goggles and a green towel. I left it on the bench by the entrance while I went for a quick dip, and when I returned, it was gone. If anyone finds it, I'd really appreciate getting it back!