I can share this from our own experience
As you know the rules under UKM for those born before 1961 changed & came into effect 2009 beginning 2010. We followed this through the steps & white paper trail as it tracked the
UK parliament.
When the UKBA finally put this on their website early 2010 my wife contacted Ottawa at the time & sent along a load of documents
We found the more the better.
Her original Canadian long form birth certiicate
Mothers Long form UK birth certificate
Mothers UK Marriage cerificate (1944) married to a Canadian soldier
Copy of my UK passport & birth certificate [not required, but sent anyway]
two coloured photo's from the photo both in the local mall
At that time we were told 6 months wait time. She applied May 2010 and my wife was not notified unil the beginning September 2010. All the paperwork is checked at the consulate/High Commission.
File is checked at the consulate - copies of the file is sent by the consulate to the Home office in London UK - originals back to you.
When you send in the application & paperwork
a) keep copies of whatyou send in
b) sen via UPS
c) if paying by card- check when they cashed it. By money order - have your bank check & confirm when the money order was cashed.
The consulate says not to call or inquire how its going & any news - because once it goes to the UK .. its await & hear back
Generally for those apply from Canada - the citizenship ceremony [all 5 mintes worth] swearing alligence tothe Queen of England is hel in one of the major Canadian cities [last we heard]
The citizenship certificate is nice .. its simply states the nationality act of 1981 & persons name is registered as a British Citizen .. issued in London UK
As for the fees ... well, when my wife applied it was $845 + small money for attending the ceremony. Seems the fee is now much less than one-year ago.
On the passport. She applied on June 19, sent via UPS to Washington
It took the exactly 31 days to cash the money & we suppose its when they handled the file for the first time.
From date of sending to date the passport arrived, it was 8 weeks & 3 days
Hope this helps
Disclaimer: I am not an immigration expert & anything that I post on visa & immigration is based soley on more than 30 years of personal experience & interaction with the UKBA & Home office.