Sash men

[ScouseBoy]

Bowler Hats  is traditional headgear  for men of the Orange Lodges.   Look it up on a well known search engine.

[aghadowey]

Lots of men wore bowler hats but that doesn't make them Orangemen 

I'm still wondering about what look like posies that a few of them are wearing- shamrocks?

[aghadowey]

This might help narrow down the date further-
In Chertsey 1873 - 1905.
1881: photographer living at Windsor Street, Chertsey.
1891: photographer living at Guildford Street, Chertsey.
http://www.photolondon.org.uk/pages/details.asp?pid=2514

The photograph seems to be taken outdoors (notice grass in front and trees in back) against a white backdrop.

[John915]

Good morning,

Just for scouseboy;

John915

[cardinalcanary]

Have to say the first thing I thought of was suffragettes but the men have the sashes not the women.

Still think some knd of temperance methodist type outing is the most likely. The azalea represents temperance apparently but I don't think its an azalea buttonhole the gentleman is wearing.

[jim1]

The Suffragette movement was much later. Temperance looks a good bet but there were also lots of Societies around late 1870's.
These men would have called these hats Billy Cock's a more common name for a Bowler.

[Trishanne]

I wondered if they could be members of the Primrose league, flower in buttonhole, but I can't find anything about wearing sashes.

[Primrose11]

Members of Friendly Societies often wore sashes which in the late C19th were often home made as these appear to be.
That would be my guess.
P