NigelF:Then WHF can probably reject such conditions & tell manufacturer bluntly that WHF is a magazine with international circulation and will not discrimate readers reside outside UK.
It's not as simple as that. Firstly there is the key issue of competition law, which varies from country to country on how competitions are run/entries taken etc etc (there's not even, strictly speaking, 'British' competition law, as Northern Ireland has its own rules!) That makes running a truly international competition near-impossible.
Add to that the fact that products are sourced from UK distributors and i'm afraid we have to stick to UK-only competitions.
We do, however, urge our overseas partners to run their own giveaways in their countries!