Mystery solved!!!!!

In the end I got onto ebay and checked out the other prams and with a bit of tweaking and cursing managed to have the lightbulb moment that there was an allen key involved.

With the emmaljunga classic, they have the toddler seat attached to the handlebar . it is quite strange! so you have to un-screw the bolt and clip it onto the handlebars and then clip on the toddler seat...does that make sense lol?

It works an absolute treat! and the girls think it is heaps of fun to whizz around in

Thanks for all the brainstorming girls!! It was bugging me no end!