Sid, as a Brit and also in the military I'd say you've done a good job
Don't fret so much about blousing the trousers and beard. Out on ops I have only ever seen trouser twists used in barracks (IE Bastion/Kandahar). When out in the field the vast majority will not use twists as the strings are there in the bottom of the legs for that purpose. Personally I don't blouse the legs when in the field.
As has been said the wearing of beards is permitted when out on ops where water is more important to be consumed than used for shaving. Not only that but a beard is seen as a good thing within the Afghan culture.
The one thing I would say is definitely wrong is the way that the flag is shown as they are "upside down".
Other than that a cracking job, well done