By the time I bought it and linked to it here, it was sold out online but it's back and even cheaper in the sale if anyone is interested (not very seasonal as it's wool but it's lovely, gets lots of compliments and is a really good price now)
Austin Reed work dress
I also tried this one on and it's lovely too though a bit more fitted/less forgiving
I like the look of this red one but haven't seen it in RL or tried on