Stuart’s been staring at the fireplace; you can almost hear the brain cells working

 
Here in London Santa will be halfway through his rounds; that means the present sack will still be half full. Stuart has plan to get all the presents.

  

That’s a very big pile of cushions balanced very high.       
Stuart’s caught something. There’s a red hat and a beard; where’s the present sack?

 That’s not Santa that’s Dave in a beard and silly hat!  
Oh dear; Stuart’s having a sulk.

 

Looks like the real Santa will be succesfully delivering presents across the world in a few days time!