PoP wrote in message . ..

BTW, if you go to Homebase to pick one of these up you may find they
are marked on the shelves as £29.99. When I got to the checkout I was
charged £19.99. Naturally I didn't feel the need to complain

So are they on offer, or were you just fortunate?

If the latter, identical levels, with goggles, are available from
Argos for £24.99 (and their 16 day money back offer if you find it
unsuitable).