A man wearing a Santa costume forced staff at a 'Nex't store' to hand him over all the cash at knifepoint.
The man, who has been described as white, of medium build and between 5ft 9in and 6ft tall, entered the store in Oxford Retail Park in the morning demanding the safe to be opened, Metro.co.uk reported.
The knife-wielding Santa Claus was wearing jeans and a blue fleece under his Santa outfit.