I’ve got an iCandy Orange — it comes as a double (toddler seat + infant bassinet). You do have to buy a few additional parts to make it the double though. Baby #2 is due next month so haven’t used it as a double yet...but have heard amazing things about it (which is why we purchased it).

Uppababy vista is a great pram for two but is very very expensive. I’ve got a Phil and teds dot which I really like, it feels much smaller and more nimble than the bigger Prams.