The British Postal Museum & Archive's proposed 2014 Swindon move is in tatters after Royal Mail pulled its funding from the project.
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.
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