Caught in passing

Passing the Royal Academy, we stepped into the courtyard to see the sculpture that is being put up for the Summer Exhibition.

It moves! The angles its "tentacle" makes are intriguing, as is its conjectured construction, its rotation along the ellipses formed from conical sections.

The tentacle seems to be looking around ... it IS looking around - there's a screen behind it, and a camera at its tip.

It's a surveillance triffid.