See the lenticular technology at work in Royal Mail's Thunderbirds miniature sheet.
See how the Thunderbirds stamps were made, and hear Gerry Anderson's views on them
The ten WWF stamps, plus a miniature sheet, will go on sale on March 22.
First images of the stamps
Unique opportunity for collectors
1st class and 2nd class values will be designed by winners
Sale amassed only £400,920.
British Postal Museum & Archive puts in planning bid.
Want the latest issue of Stamp Magazine? Use our magazine locator link to find your nearest stockist!