Tea drinkers - Win a flight in a Spit!

Saw this tweet today:

'did you hear Spitfire on R4 this morning? You can win a flight in a Spitfire with a golden ticket in RAF tea tin http://twitpic.com/2ftuh0

Get yourselves down to Sainsburys for the Golden Ticket!

Nb; looks like it might be open to UK residents only - but you never know!