So I have finally LANDED!!
Just want to give a brief summary of our experience for future reference for other members of the forum.
Our COPR was sent to my old address, despite me updating mailing address 3 months ago via London and Ecas but that didn't matter, luckily it was still within my 3 months of royal mail redirection and was delivered to my parents house. It took about 10 days from official DM on COPR (23rd October) to the COPR being delivered. It then took an additional week for it to arrive in Canada from my parents house.
There were mistakes on the COPR they had my 7 year old down as Married and that her country of Residence was England, both wrong. I called CIC in canada and they advised to send the COPR back to London to be sorted. I really didn't want to do this as it would be delayed even more. I was given advice from another forum that the border officers could change the information as long as the name, dob and passport number were correct. So we decided to take the chance and go a day trip to Maine.
We went through the St Stephen Border. The USA officers were extremely nice and as UK citizen we were required to get out of the car and go inside to fill out 2 green forms and pay $12 dollars US which we were not expecting and didnt have on us, however they were able to take our VISA debit and we were then on our way.
It took us about another 2 hours to drive from the border to Bangor, we did some shopping and OMG the prices of things compared to Canada are awesome, we will definately be back to do Christmas Shopping there next year.
We drove back to Canada and when we got to the Border we requested to Land as PR, the staff there were also friendly and efficient. They took our COPRs, amended my childs wrong details, asked me to read over it and sign both copies of forms. The Officer also signed the COPR, stamped our passports and wrote numbers in them.
It was probably the best day I have had in a long time, everything just went so smoothly.