Yes it's an EdP. I found it quite different to Wickham 24. Definitely the same feel with one modelled on the other but the Wickham is far fruitier which suits the soap.
Search for perfume-parlour if you want a close-ish variant of the spray without spending a fortune. It's respectably close and lasts well too. The real-deal has a tendency to cause anosmia (nose-blindness) as a result of some of the larger molecule musks which are used in the formulation. Same effect as not being able to smell the inherent smell of your own house but being able to smell that of a friends', for example.
Edit: For what it's worth, I would wholly recommend Classic 24. It's a gorgeous scent in its own right.