I visited one of my favourite areas of London earlier today, the Thames’ South Bank, where I went to see Olafur Eliasson’s Weather Project at The Tate Modern. There’s a half circle of the Sun made up of mono-frequency lamps – the kind which provide the orange glow to our streets at night. Running along the ceiling of the vast turbine hall is a mirror which gives the whole image the look of a whole circle, the sun. You can watch yourself in the mirror on the ceiling, and many people do, indeed, lie on the floor looking up at themselves and the other ant-sized people. The lamps really restrict the amount of colour that you can see, and that makes the whole atmosphere and experience quite eerie indeed. In fact, despite the orange glow, it’s very grey.

I am not a great fan of museums and galleries, but I really do like the Tate Modern and the Turbine Hall in particular. If you don’t know it, it’s a vast gallery space that once housed the turbines of the Bankside power station. It’s huge and always seems to house interesting works – which is what attracts me back on a regular basis to see them.

On this day…

• 2004: Night Off