I received the same mail a week b4 ,didnot ask photos but i sent , snaps , ppts copies and updated chart.The snaps were four months old though meet specification ,will there be any problem???
It is diffierent case to case some ppl ecas updated within couple of wks after medical and some have to wait long.In my case they updated medical results received after 7months and 8 day ,received PPR1 two days b4 the update of Ecas..so dont worry I suggest wait for 4 months and then send CSI...
I don't have much idea but when the VO reviews your file he put some remarks ( for example any requested/asked or waiting for)on your file and mention the next review date called BFD bring forward date, plz check the site for ur knowledge