Written on the reverse, "Les" and then "Reading 150m". I have no idea of the significance of the 150m, unless it is something to do with his location along the river path (I think it is the river and not the canal). Date, 1930s.
He looks about to get into the water, maybe something to do with his fishing.
Despite having spent a few years in Reading (back in the '80s), I have no idea where, in relation to the town centre, this stretch of the river is. The bridges make me think that it is somewhere near the train station but it has probably been redeveloped many times since this photo.