It's the summer solstice today. We'd love to say we gleaned this knowledge by pulling some clever trick with an astrolabe and the Londonist golden orrery but, no, we were alerted by Skoda's PR company.
The car manufacturer commissioned artist Tommy Gunn to recreate Stonehenge using 18 scrap cars. The so-called Citihenge (it marks the launch of a new car called the Citigo) is on show at Potters Fields next to City Hall for the next two days, apparently on the confluence of "little known ley lines". Thenceforth, it will process around the country, bringing motoring mysticism to the masses.
Those who prefer less commercial interference in their midsummer observations should check out this list of pagan events taking place in the capital and elsewhere.