Lobster :
Yes I've seen the commercial zappers in operation - ie the ones which
glow blueish in shops and restaurants - are they "UV" in operation too?
I'd assumed the Aldi Jobbie was an el-cheapo domestic version of these;
is that not the case - does it have a different MO?

Yes. There's no light or any other device to lure the insects in. You
wield it like a swatter (except that no force is required). That's why
it's constructed like a tennis racquet.

--
Mike Barnes