Thorntons invited passers-by to tuck into the 14.5ft by 9.5ft sign in Covent Garden.

The Easter creation, a world first, was made of 10 chocolate bunnies, 72 giant chocolate eggs and 128 chocolate panels, each weighing 2kg.

The billboard took three months to plan and 300 hours for the team of 10 to build and was expected to last a week.

"There was something for everyone from giant bunnies to hazelnut eggs," said chocolatier Barry Colenso.