First Deal, so be gentle!
Two nights in a four star hotel with spa treatments available any time during Jan/Feb (see exceptions below), including B&B, Dinner on the first night and a free bottle of champaign. Seems to be limited to this MacDonald Hotel in Shrewsbury, but I can think of worse places to be.
One caveat for all you romantics, the price jumps to £239 if you go on the 'Valentines' weekend (16th-17th apparently). Still not too bad IMHO.