I found him!

...oh it's the postman! Ah well I'm sure Santa was in the back of the van sorting the parcels!

Here's some interesting facts about Santa's origins...

Pre-modern representations of the gift-giver from church history and folklore, notably St Nicholas and Sinterklaas, merged with the British character Father Christmas to create the character known to Britons and Americans as Santa Claus.

Saint Nicholas of Myra is the primary inspiration for the Christian figure of Sinterklaas. He was a 4th century Greek Christian bishop of Myra (now Demre) in Lycia, a province of the Byzantine Anatolia, now in Turkey. Nicholas was famous for his generous gifts to the poor, in particular presenting the three impoverished daughters of a pious Christian with dowries so that they would not have to become prostitutes.[8] He was very religious from an early age and devoted his life entirely to Christianity.

The earliest Father Christmas appeared during ancient British mid-winter festivals. He wasn't known as Father Christmas then, of course, but as a general pagan figure who represented the coming of spring. He would wear a long, green hooded cloak and a wreath of holly, ivy or mistletoe. It is the association with holly and mistletoe, and his ability to lift people's spirits, that we retain from this ancient Father Christmas.