Birds of Prey have flown early - at old prices?

It's a while since anybody has reported the early release of any of our special stamps, but DB has provided a picture of this torn off corner of an envelope showing one of today's new Birds of Prey stamps.

Of course it could have been as recently as this week if one of the Mail Centres was still using the Red Nose Day slogan in error. 

But it seems more likely that this was used in the week 9-15 March, nearly a month before the issue date, and presumably sold at the old price!

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