Laura,
I noticed you're bringing your cat- I assume you've already gone through the PETS Scheme and waited the 6 months for the rabies blood test? It caught us off guard, and I think we'd already be there if it wasn't for that portion but we simply are not going to give up our dog.
It's just the three of us going. Ideally we'd like to have a flat sorted before we go if possible, but we do have the "last resort" options if we need them. By wanting to reside in Scotland, it's created a bit of a pain as the only two ports of entry with a pet are London and Manchester, so I'll likely have to hire a car to get us up there.
As far as the application, my wife is the Ancestry Visa and I'm the dependant applicant. I've heard the same horror stories with the bank account stuff, but I'm hoping that because I previously held accounts with both RBS (and worked for them) and the Bank of Scotland that I can get one with no worries.
Family and friends think we're nuts. They forget that I've previously lived there, and that it's not as expensive as everyone thinks it is- at least not in my eyes. I don't expect to own a vehicle right away, or ever for that matter; the public transport is a heck of a lot more efficient there than here (but I know the Brits still complain about it). I don't need a 4 bedroom house with 3 acres of land. I don't need a big screen TV and all the toys. In my eyes, Europeans are a lot more modest and to me, it makes sense. Sure, some things cost more there than here, but it's how you choose to live too. However, we'll gladly trade our lives here for 5 weeks holidays, 7 hour workdays, and just a lifestyle that's so much more laid back. Plus if we decide to have kids, they'll have the opportunity to have Canadian citizenship, and then
UK citizenship (provided we go for it after our 5 years) and thus opening the doors to the rest of the EU; to me that spells out a lot more opportunities.