Tesco in Blackburn have various baby sizes of these Chewbacca Snowsuit/Puddle Suits/Pram Suits or whatever they are called for £5 down from £14. Found in the sale rails.
I loved them but my wife hated them so that meant we didn't buy one #TheForceIsNotStrongInMe
Apologies for the poor pic. I tried to take one to show Chewy's face on the hood.