BRITAIN is being urged to come together to spell out "we miss you" in letters so huge that Princess Diana will be able to read it in heaven.
The 'Big Message' is being co-odinated by the Cabinet Office in conjunction with the Daily Express, OK! magazine and LivingTV's Most Haunted.
Justin Toper, the Express astrologer, has confirmed that Diana will be able to see the message from her villa in heaven, while the size of the letters has been calculated by former Tomorrow's World presenter Philippa Forrester.
The message will begin in the Lake District and skirt along the western edge of the Pennines before descending through the Midlands and into the South East.
The emotional tribute will end with a 45-mile-long exclamation mark running from Maidstone to Horsham.
To ensure maximum visibility every volunteer will be given a bright yellow tracksuit and baseball cap sponsored by one of Diana's favourite charities, the Dove Campaign for Real Beauty.
A Big Message spokesman said: "We've gone for jolly, playful lettering to reflect that side of the Princess's character.
"Diana liked nothing more than shopping in Knightsbridge, having a light lunch with a close friend and then phoning the Daily Mail and accusing Prince Philip of trying to kill her."
Prime minister Gordon Brown, Tory leader David Cameron and Archbishop of Canterbury Rowan Williams have already pledged their support.
The Prime Minister said: "This is a once in a generation opportunity for this country to come together and send a message to heaven. This will be Britain's Apollo programme."
Mr Brown is expected to travel to Matlock in Derbyshire where he will join the bottom half of the letter 'I'.