DP got a plant for £1.50 in the clearance sale at the garden centre but doesn’t know what it is 
It was doing very well, growing at a rate of knots and then it very dramatically withered and died when the weather turned cold. I’m almost certain it’s fully dead but he isn’t so sure.
Before we dig it up, can anyone please identify a) what it is and b) if it’s beyond saving. I’ve attached a before and after! Thank you 😊