Yeah, its an Elite Volare(?) surely? In which case the roller is sprung loaded against the wheel – so of course you can stand up!!
With a compact gear set up (or mountain bike gears) then even on the highest resistance setting and in top gear you can pedal at a pretty pretty high cadence. Its hard work to keep it up though, so you can still get a decent work out.
I bought a Tacx Blue Motion after this, and by contrast, on the highest settings its almost impossible to pedal.
If its your first turbo then the Halfords one will do a good turn!