The title is highly misleading; nowhere in the article does it say that these are being scrapped in the whole of the UK. For all we know some trials are continuing at other airports.
Also the way I read the article, they're just replacing them with identical scanners soon anyway, which use different software to preserve privacy (but still hit your junk with harmful x-rays).
Trials are not continuing at other airports; rather, universal roll-out is underway at ALL UK airports carrying international traffic. And there's no opt-out in the UK -- if you're selected and you don't want to be scanned you will be arrested.
It looks like you might not get arrested, but you definitely won't be permitted to fly. The BBC report on two women who refused scans in Manchester says they 'left the airport', with no mention of arrests. (http://news.bbc.co.uk/1/hi/england/manchester/8547416.stm)
It's still not a good situation. I don't travel often, and the installation of scanners at Edinburgh is adding to the stress.
Also the way I read the article, they're just replacing them with identical scanners soon anyway, which use different software to preserve privacy (but still hit your junk with harmful x-rays).