Here are some pictures from the CAAN/Backlash demo last sunday - the eve of the coming into force of the "extreme images" ban. Thanks to Clair Lewis for letting me have them.
Taking centre stage here, erotic fashion photographer Ben Westwood, who last time led a group of chained fetish models around Westminster. One of the "slaves", Jade (more conventionally dressed this time) is busy texting.
Here's Clair herself looking at home in front of a TV camera. She later turned up on the BBC Ten O'Clock news.
Another proud day in the life of the Home of Democracy.