TPS doesn't work for overseas call centres
They're not bound by the rules of the UK's Direct Marketing Association (DMA) who administer the TPS and it's snailmail equivalent the MPS.
You'll certainly drastically reduce the calls you get if you use TPS, but never completely get rid of them.
( Snappyuk gets BIGGER with free sample., Thu 27 May 2010, 18:25, 1 reply)

Indeed you are right there, but since we signed up we've only had about 2 calls in the past 6 months that we couldn't get the number via 1471.
(Mensa Reject has gone out, I'll be back on, Thu 27 May 2010, 18:43, closed)