I was surprised to find this in Mytholmroyd on 25.1.15. It is a group that doesn't have a common name, only "Hellebore". Chris JB reminds me this one is called "Stinking Hellebore."
H.foetidus is a very rare plant in Yorkshire, usually growing on lime. This is probably self-seeded from a garden plant, or a thrown-out plant, as it is growing on a demolition site.
It's not in Murgatroyd (1994).
These daffodils were blooming by a pond at Mytholmroyd on Sunday 25.1.15
Whilst there are some daffodils from abroad that flower in mid-winter, these look not that far removed from the native species, just a little larger.