please empty your brain below

Surely new Southgate cemetery is a spurr and wheel design?

No one? Fine. I'll get my coat
re. the Millennium Dome, it would have been better for bragging if they had claimed the diameter as 366m, since 2000 was a leap year.
The North-South Circular, can't think of any straight bits
PS Don't feel the need to walk it all

dg writes: Not a circle.
Valence Circus, Dagenham?

dg writes: 220m. Added, thanks.
The Greenway, Wells, Epsom Common?

dg writes: Not a circle. Not in London.
You could make a case for the inner pavement around Crowley/Cosedge being a complete circle, even if the roadway isn't. Streetview suggests this to be the case.

Great idea for a post, anyway!
The red circle containing the letter 'M' that marks the top of every bus stop in London.
Also waiting for you to reject the circle line as 'not a circle'
Is Park Crescent in Harrow circlish enough?

dg writes: It's a little irregular. But 180m.
Thank you dg, not enormous but a fairly large circle, Diana Fountain, Bushy Park.

dg writes: Diameter 125m - quite possibly London's largest circular water feature.
The London Eye is presumbably the tallest circle at 120m diameter.

But we fall down compared to Stockholm on hemispherical buildings, where Globen has a diameter of 110m.

While usually used for concerts and ice hockey, my favourite use of Globen is as the sun in a scale model of the solar system that stretched across Sweden. Mercury is about a foot across and is located at the City museum, two miles from the arena. And the system continues out to the dwarf planet Sedna located over 500 miles from Stockholm.
Is the new Wembley Stadium completely circular?

dg writes: According to Encyclopedia Britannica, "almost round". Added, thanks.
There is a rumour that sometime in the last few years there has been a fatality amongst the cyclists that (ab)use Regents park inner circle as a free high speed velodrome (often at more than 20mph)--said cyclist running into back of a stationary (parked) vehicle at speed.

I haven't been able to source a news report to confirm this, though, which is why I call this a rumour.
The proposed MSG Sphere concert venue in Stratford would be 120m in diameter, just about beating Stockholm's Globen.

Near the Waterworks Corner junction of the North Circular is a 160m wide circular clearing in the forest, called simply "The Circle".
Ever feel like you're just going round in circles?!
Unfortunately the Round Pond in Kensington Gardens, erm, isn't. (It's about 250 metres across its long axis)

Shame the Greenwich Meridian doesn't count.
My favourite non circle in London is a street in North Wembley called "The Crescent" It is about 400m long and dead straight. It's a shame the planners didn't go the whole hog and call it "The Circle".

Outside of London, State Circle in Canberra is 3km long.
How about Royal Circus SE27 - a circle on the map, built on a hillside?

dg writes: 120m.
i'm guessing (as i often do) that the Circle-Line is the largest non-circle, circle named thing in London
Three Mills Green?. i make is somewhere around 108m. Not a patch on others, but on your doorstep.

Doesn't show up very well in Streetmap...

Long time lurker, never interacted, until now. Really enjoy your blog!
M25 junction 30 looks bigger on the map than 29.

dg writes: Not in London.
Millbrook testing grounds (for cars.) 1km circle!

dg writes: 30 miles outside London.
I guess the Circle of Lebanon at Highgate Cemetery is too small. It seems the inner circle has a circumference of 500 feet, so perhaps 150 feet in diameter, but presumably the outer circle is significantly larger.

dg writes: 40m.
Circular, notable, but not large.

Replica Shakespeare Globe Theatre (33.5m)
After visiting Crowley Crescent in Waddon,you should've taken either a 154 or 157 to Morden,and then strolled up either Kenley Road or Poplar Road to Circle Gardens,which is built in a circle.Most traffic uses Circle Gardens as a two way road.The exception is the bus route K5,which treats Circle Gardens as a roundabout.

dg writes: 100m.
From Twitter:

"A shame that Arden Crescent is only a semi-circle. Completed, it would have dwarfed those with a diameter of 470m." (@Calmeilles)
I wonder if there are any structures underground which count, like pipework..
Clyde Circus in Tottenham. Just west of Tottenham Green. Very nice and it also boasts a conservation area.

dg writes: 70m.
Underground circles:

Bloomsbury Square underground car park (double helix circle). Famous from various films. Circa 70m.
Roman Amphitheatre, Guildhall. Shorely worth an honourable menshun.

dg writes: Not circular.
(105m long, 85m wide).

There appears to be a circular enclosure around the Wimbledon Common War Memorial, beside the Richardson Evans Memorial Playing Fields. The map thing suggests it is about 160m across.
Also not winning a prize, within the M25 but in Surrey, in Whiteley Village there is Circle Road, about 170m diameter, surrounded by Octagon Road, about 340m across.
I used to live round the corner from Crowley Crescent on Violet Lane until I was six.

Near Epsom there is the Greenway but it's not quite circular and also not in London
Westferry Circus.. circular, but probably too small.

dg writes: 90m.
It's a mere 54m, but the road round the fountain at Waltham Forest Town Hall is at least a proper circle.

The Velodrome in the Olympic Park is another not-quite circle, around 130m across.
Bermondsey Spa Gardens has a 107m diameter circular path.
Oooh I was going to say the Greenway too. 420m, just outside London though. And it should be a circle as it was a measured area from the well in the centre - but clearly its gone a bit skew whiff in the last 300 years.
"I unintentionally walked into a group of grieving policemen by the chapel while I was trying to keep out of the way of a fox."

This is the best sentence I've read in ages. Thank you, DG.










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