Hi Jane
You can date it before 1912 as that was when Territorials who had signed the Imperial Obligation were issued with 'Imperial Service' badges.
Ken
Hi, they all look to be wearing Royal Sussex cap badges but when enlarged it pixelates and becomes unclear, just one point, I just wonder if the stretcher bearer on the left as you look at the photograph is wearing a royal Sussex 4Th territorial shoulder title
or am I clutching at straws.
http://www.britishmilitarybadges.co.uk/wp-content/uploads/2015/06/E2A1a5851_4.jpg
Regards
Frank.
Thank you Ken and Frank.
To my untrained eye the cap badges all look to be Royal Sussex .
The one on the link looks like the one on the epaulette of second man from left front.
I googled the Territorial Imperial badge but cant see that one, thought it was one on epaulette but but has a flat bottom.
That leaves the badge on the upper arm, which one is that?.
I noticed the guy next to granddad has three stars on tunic lower arm, what are they please.
I am so sorry if I am being dense but am really trying to work all the badges out.
I think we all agree it is a training exercise possibly 1908-1912. Am right in thinking that group could be made up of different regiments who were being trained at Newhaven?
Oh dear, it would be quicker to train a monkey

Jane