This could well be around 1916 & maybe there is some tension in this photo.Given that the Easter Rising took place in 1916, the religious tensions would have been high at the time. The route may well have been known, and the Union Jacks could be a show of allegiance.
My image is also posted on a Facebook Unidentified photo group where I state Birmingham or Manchester area as I have seen many Whit-type postcards over the years from that area. But they do not have that street architecture in my view from many searches I have made but which screams at me from some of the great images on this site (I love some of your images). What is missing from my Birmingham searches are similar processions. It is also interesting that no one so far has spotted a possible location. I could be wrong but there is a late Victorian/Edwardian building style in Brum that does not seem to exist even locally in the Black Country & Coventry; & certainly not in my area of expertise: Worcester, Redditch, Bromsgrove, Kidderminster. I would be interested in your thoughts as to whether it could be Birmingham: images seem to be lacking from certain areas of that close-knit terraced housing belt around central Brum. I am not sure if it is worth checking this all out (but I enjoy learning more about Brum). Actually there are subtle differences between traditional Whit-type walks & my image which makes it even more frustrating. I am certain that the part of the procession shown in my image does have a Roman Catholic context.
The likelihood is that this photo was taken during WW1 because of the news poster concerning the war. I would posit that it is not Edwardian.All the hats are decorated with flowers. The collars on the men and boys look 1920s to me. The sashes worn by the girls are a unifying feature between the different groups with their specific banner. Do the sashes represent a cause or movement ? Do the flowers on the hats represent Easter ? Why aren’t there many boys in the line up? Do the girls represent purity? Viv.