That's what I bought @Ashley quite a few years back now, a set from Argos... 1.5kg, 3kg, 5kg maybe.
Only really use the 5kg one now, but were a decent starter set at the time.
But I'd now follow @Fierce_LiNks advice and get a set of dumbbells can add your own weights too now.
Also FLink, what bench did you buy?