In case anyone wants to know- they are wonderful.
I thought paying £29 for tights wass a bit mad but they are worth it. They are lovely and soft, have a proper gusset ( comfy), properly shaped toe and heel, and a wide waist band. They feel as warm as trousers and much warmer than cotton leggings.
They are much nicer than both Autograph and J Lewis equivalents which IMO are a bit skimpy in the sizing- I'm a 10.