Thanks everybody for your comments - have now changed my seats so they're all centre aisle seats with the bassinet
I'm sure it's going to be a tough test of my parental abilities but there's plenty of good advice and tips on here about travelling with littl'uns so I'm sure I'll be reading and re-reading those until I can quote them backwards!! TBH bubs is pretty good at the moment for sleeping and is quite a placid baby when he's awake so hopefully I can keep him happy so as not to upset my fellow passengers - I've certainly done the longhaul with other people's screaming children but that's one of the joys/pitfalls of this emigrating business. I don't think his UK grandparents would be happy if they didn't see him until he was ten and could rationalize dealing with a 30 hour journey