HORIZON VOCATIONAL TECH: MARK & REBECCA

Millions of Facebook users say they avoid uploading photos and remove their name from all pictures of them on the site because they feel too fat, old or ugly. A survey found that almost one in two people admitted to leaving out pictures from their "fat days" when uploading pictures to their online profile.

In addition, one in 10 women admitted to feeling sick when they saw a picture of themselves on Facebook and 13 per cent avoided being photographed altogether in case the images ended up on the site.

One in 10 admitted to using a photo of someone else on their social networking profile, like their dog, an avatar or cartoon drawing, to avoid old friends and work mates seeing a real picture of them.

Jan Vormann, 26, has taken his project from its humble beginnings at an art fair in Rome and brightened up thousands of people's days with his brightly coloured plastic version of Polyfilla.

From the old quarter of Tel Aviv in Israel to the grand Bryant Park of New York, Mr Vormann has acted either independently or with the city's permission to leave a little part of his childhood behind.

Estimating to have used upwards of 1,000 of the little Danish building blocks, Mr Vormann enlists the help of passers-by intrigued by his careful placing of the Lego bricks.