Some of the nations most celebrated writers, actors and comedians have created monologues for a range of statues across London.
Streets on the development in are meant to be named after British butterflies.
Abseiling technicians are scrubbing each of the four faces of Parliament's Great Clock, checking them for damage.
8,000 people are getting together to meet their online video idols.
The UK's biggest YouTube festival, Summer in the City, is being held at Alexandra Palace.
The event was set up by vloggers and allows those YouTube stars - many of whom are hugely popular - the opportunity to perform in a live setting, often in front of the biggest audience of their lives. The fans can watch their favourite musicians, comedians, video bloggers and filmmakers on the main stage, but also meet them face to face to get a selfie or an autograph.
– Tom Burns, Summer in the City founder
Summer in the City is an annual event that brings YouTube stars from across the world together with content creators, fans and industry personnel for the UK's largest celebration of all things YouTube. The weekend features live performances, talks and many opportunities for fans and content creators to connect with each other and meet their favourite YouTubers.