chattr +a -V

Digitalglobe.com has made available satellite images in .jpg format, of London (an overview) and the locales where yesterday's terrorist bombings took place:

• London overview image (4.14MB)
• Edgware Road Detail (3.01 MB)
• King's Cross - Russell Square - Woburn Place Detail (3.08MB)
• Liverpool Street - Aldgate Detail (3.20MB)

Found these via Satellite Imagery: London Media Gallery on ResourceShelf, though the site's not loading at the moment.