So summary. Aksium, cheap, heavy (>1800g) and not aero.
You could get a better feel from them by just sticking a decent pair of supple tyres and maybe some latex tubes on there (probably best take bikebouy’s advice as he’s from your neck of the woods.) So under 100 quid for tyres and tubes.
You could get some better all rounder style wheels, you’re probably looking at around the 600 quid mark, that’d drop a fair bit of weight (at least sub 1500g) and would feel a lot more sprightly (you would notice quite difference.) Example being that Panceti build mentioned above. Or you could go higher end Ksyrium for example if after a factory build. You could go cheaper but if looking for a significant improvement I’d be looking at this sort of budget.
Then around the 1000 quid point you start getting into the lower end of the aero wheelsets, but also some nice all rounder factory wheelsets like the Ksyrium SLR. You could get some very nice handbuilts for this budget too (see Strada or JRA.)
At around 1500 quid and upwards you start getting into the real performance carbon aero wheelsets, Zipp, Reynolds, Bonty, etc. Or the seriously light climbing wheels.
So need to decide what your performance priorities are and how much you want to spend. Also what you’re going to use them for (all day, every day, would need to consider maintenance.) And if pimp/aesthetics are important, then what looks right on your bike. So, OP, what’s it to be? 🙂