I do love snow. When it's fresh that is. We've just had our first real dusting of snow here in Surrey for about four years.
I've seen lots of sledges in use already. However, I'm sure there be some panic buying of sledges somewhere.
So, if stocks are gone at your local toy shops and garden centres, it may be worth trying Cotswold; a chain of outdoor activity stores. They sell the sledge pictured, it's wooden and has a traditional look, however, it can be folded flat for storage; price £78.30 (gosh! think of the VAT you're saving).
Cotswold also sell some reasonably priced plastic sledges, prices start from £4.89.