OK, Royal Scots -3rd Div
Info for the 2nd is - Blue colour patches and different shapes for each company
A Square, B Triangle, C Diamond, D Circle and HQ a Five Pointed Star
The first would have the same system but the colour is not mentioned.
First East surrey were in the 5th Div in 1917, according to the Osprey no insignia were worn by this division.
Can't find any reference to the Shrops LI in the book.
Hope this helps anyway.