but Happy, there's a difference between the width of the sitting bit, and the wheel width. It's not a mathematical thing. Mathematically they may be the same, but you can overlap wheels in a confined space, you can't with the sitting bits. IYSWIM.
So, I know for a fact that you can fit a P&T and a maclaren, for example in the wheelchair space on a standard London Bus. I also know you can't with a Mountain Buggy side-by-side double. And I think lifting any buggy with 2 infants /toddlers in is bloody heavy. That said I'm a titchy 5ft 1", and I managed to heft the P&T on and off buses etc pretty easily, and I had mahoosive baby and very big for her age toddler in it.
Look, I agree that, for example, the mountain buggy is lovely to push, and lovely for them both to sit in (although my friend has one, and her two fight, constantly when in it - a situation avoided when they can't get at each other in a P&T!). But on a busy bus, in London, side-by-sides are a bloody nightmare.
I also tried the single and sling and buggyboard option, but I found my massive babies and small frame made it too difficult day-to-day. DD1 wasn't really good on the buggy board, properly until she was nearer 3.
HandMini - no, I know that's what you were getting at. It was just a heartfelt plea from someone who had just had to spend an additional 20 minutes in driving rain and wind with two tired children because of someone taking up the entire space on a bus with a MB double. Driver "You can't get on, there's a double on already...". Me [fume].
IMHO P&T works really well for what you want to do. It's not perfect, but they're easy to pick up on Ebay for not much ££, or even, as I did, borrow from a friend to test-drive for a few weeks first. I gave mine (bought on ebay) to a friend, otherwise I'd have loaned it to you... :-(
db
xx