Yes, Dave. *They've changed the system this year and will not accept posted or emailed certificates.You have to take it with you when you collect your bib and so have only one chance to get it right.* Using their pro-forma will save you any hassle and the 'stamped' bit is important. Nearer the date, we'll probably be emailed a ' Confirmation of Registration' letter. They'll want to see this, and your Passport, too.
And you're right, David, being a member of your Home association doesn't exempt you.
I'm not staying near the Start/Finish but hotels around there should be a bit cheaper than in the city centre...and Line 1 takes you right into the centre anyway.
This is an invaluable tool for planning trips around the place.