White globe radish

I have just harvested one of the white globe radishes from a mixed radish pack from B&Q (only cost 38p).  The other half says they are much nicer, spicier than the red ones, of which I have grown a few different ones.  I don't eat them so wouldn't know.  I know its a shot in the dark but can anyone think what variety they might be..........the packet doesn't say just says mixed.  The radish was quite large.

Ta
Sheila