It came!! Today!!! Our 90 day letter!!! I am soooooo excited! Yours must be on it's way! It's a standard letter asking for new Schedule 1 (must send), new IMM0008 (must send) then all the other items are if circumstances have changed (dependents, financial, Education etc). The Police Cert doesn't need to be sent again (I know someone recently posted that too) unless you've lived in any other countries since you applied. It asks for 2 recent photos of dependents under 18 (I don't know if that means the formal passport ones, or whether home photos are acceptable).
My printer is in overdrive, printing off the two downloadable docs from the Embassy site (http://www.canada.org.uk/visa-info/forms/skilled/e_skill.htm - I think BCrabbit already gave you that link?).
Let me know when yours comes!?