Here's an idea. Build temporary cofferdams in historic stretches of the Thames so that archaeologists can really get to work. It's amazing what you can find beneath a river that's served a city for 2000 years. Image by M@. Got an idea for a Touch Up London? Check out our archives, and send your own figments to londonist - at gmaildotcom.......

Scientists at the Natural History Museum who have been analysing big cat skulls excavated from the Tower of London in the 1930s have today confirmed that there were Barbary Lions from North Africa with magnificent dark manes resident at the Tower of London Royal Menagerie as far back as 1280 AD. This makes them the earliest confirmed lion remains in the British Isles after the extinction of the Pleistocene cave lion at the end......