Currys - Reserve and pick up in store

Hi I want to buy a digital camera and want to go to a shop and get it (too impatient for online). The best price is Currys if I reserve it online and pick it up in the store.

My question is, how long does the reservation last? I need to pick it up tomorrow. Shall i reserve now or tomorrow morning. The site seems to contridict itself saying different things in different areas.

So anyone got any experience of this? rep waiting ;-)