Searching for a pre-grouping Christmas advert.

[Spartacus]

I wonder if anyone can help me locate a particular railway ad/poster from pre-grouping day. It’s clearly Christmas related as it’s main feature is a portrayal of Father Christmas sat in the train partaking of a meal of Christmas Pudding and perhaps a glass of sherry. It’s particularly notable because Santa’s wearing red, at a time when his costume colour wasn’t yet fixed. He must have enjoyed quite a lot of dinners since then as he’s noticeably slimmer than he’s usually depicted!

Once again, I hope someone can help and thanks for trying. I’ve tried for a while but keep turning up nothing but Santa Specials and Santa-Fe ads!