Secrets of the royal snaps - a £1 worm!

By RICHARD KAY Happy occasion: The Royal portrait with Eliza and her wiggly friend at the front, second from leftAs Royal Family wedding portraits go, it was reassuringly traditional. But there was an unexpected guest in the line-up — and it kept the Duchess of Cornwall’s granddaughter Eliza Lopes smiling for the camera.In her hand was a £1 ‘wiggly worm’ which Camilla revealed yesterday had been