As you can see this is a fix for a broken axel. The total cost of the repair was about £2.
All the components I've used are M6 - mainly because I had them in my tool box.
2 x bearings (608ZZ 8mm x 22mm X 7mm)
1 x M6 threaded rod
4 x M6 washers
2 x M6 penny washers
2 x M6 A2 domed nuts
The repaired wheel is now back on the pram - I'll report back after the road testing.