Shelter is calling on Glastonbury festival-goers to create a sea of red brick cards to protest against poor housing for children. One in seven kids in Britain – which adds up to 1.6 million in total - are now growing up homeless or badly housed, says the charity. The headline act of Friday's “Shelter Day” in Glastonbury's Left Field will hand out the 5,000 red brick cards to the crowd and ask people to hold them above their heads in a mass protest.

Shelter will also be camped in the Left Field throughout Glastonbury and is asking festival-goers to help transform its 20-metre interactive white Wall of Shame into a red Wall of Hope by customising thousands of red brick stickers with signatures and messages of support.

"Thousands of people who rock up at Glastonbury will be caught in the UK housing nightmare underlined by the chronic shortage of affordable homes,” explains Left Field organiser Geoff Martin. “We know that they'll want to join with Shelter at the Left Field to send a message loud and clear all the way from Worthy Farm to Downing Street - build affordable housing and build it now. If Michael Eavis can do it then what are the government waiting for?"

Shelter's Wall of Shame was launched in November 2006 and is currently on a four-month tour of the country. Stars that have already supported the campaign include Kings Of Leon, The Killers, Editors and Billy Bragg.

The Wall is part of Shelter's campaign to persuade Gordon Brown to fund an extra 20,000 social homes each year to help give one in seven children in Britain who are homeless or badly housed the chance of a brighter future.

For more information, see: www.shelter.org.uk.