I'm not too sure why he didn't like the idea but we discussed it again over dinner and we decided to give it a go. (I can be very convincing ) They are both very good sleepers and we don't have any difficulties getting them to sleep, so I'm feeling quite positive. I'm going to re-arrange their bedrooms tomorrow to have a little test run before we move house. It will probably be better for them to be comfortable with the new bedroom arrangement before having to get use to a brand new house as well.

Thanks for all of the support & advice