Bringing into a relatively warm house with no water will do the daphne no good at all. I am not sure of the species (mezereum?) but frost is not likely to cause it harm. Can you plunge the pot into the ground in a sheltered position? This will ensure that the compost is kept moist and that it avoids the worst ravages of winter.

Thank you, I will give it a try!

Or have it 'fostered' by a gardening friend or neighbour?

If it is mezereum I'd agree with Bulbaholic

I would guess that it is Eternal fragrance or similar and would be on the tender side, being a young plant. Like the idea of 'fostering' it. Would be happy in a light, sheltered, cool greenhouse, frost-free environment.