I found a number of real photographic postcards showing funeral processions and crowds at the graveside.
The first shows the enormous procession at the funeral of the late Councillor Rogers and the horse-drawn hearse carrying his coffin. Poignantly, the reverse is inscribed:
To Dear Hilda From Her Loving Mother.
"My dear Fathers funeral" April 10th 1912.
A later owner writes - Probably Bridlington, North Yorkshire
The second shows spectators, dressed in their Sunday Best, watching a hearse drawn by two black horses pass by/ The coffin is draped in a Union Flag. I wonder whether the deceased is a First World War soldier.