From Platform 0 to Platform 9¾: The strange world of British Rail mathematics

The infuriatingly mis-located Platform 9¾ at London King's Cross. Image: Getty.

Any fans of traditional counting systems unfortunate enough to find themselves travelling via King’s Cross will immediately develop a headache. There are 13 platforms – only one of which doesn’t exist and yet the highest platform number is 11.

The non-existent platform, Platform 9¾, is in the wrong place. As a tribute to the fictional magic platform created by the liar JK Rowling for her Harry Potter books, half a luggage trolley sticks out of the wall in the station concourse, which means 9¾  sits innumerately between platforms 8 and 9. It would have been physically impossible to put it on the wall between platforms 9 and 10, because there isn’t one: Rowling cocked up and was apparently thinking of the layout of Euston station. Not sure that would have looked quite as iconic on film.

That still leaves us with one real extra platform: platform 0. When this was added to the station, replacing a cab rank next to platform 1, it was decided that either renumbering, or having numbers in the wrong order, would both be too confusing, so they ran the numbers backwards to get to 0.

Platform Y was considered, because it runs alongside York Way. But having lettered and numbered platforms in the same station was also deemed too complex, despite the fact that, just across the road, St Pancras does exactly this: Thameslink services run from platforms A and B.

Platform 0, Stockport station. Image: Bob Harvey/Geograph.org.uk.

King’s Cross isn’t the only station to have a platform 0: others include Edinburgh Haymarket and Stockport. Cardiff Central has a platform 0 that it’s probably stuck with, as the existing numbering system was built into the fabric of the building: there are platform numbers in ceramic tiled panels that can’t be changed, because the whole structure is listed as one of the best remaining examples of a 1930s-era GWR station.

Even where renumbering is feasible it’s not as simple as changing the signs: there are also signalling issues and letters of complaint from a man who’s been catching the Peterborough train from platform 8 for the last 30 years to consider.

As if it wasn’t bad enough for stations to have “extra” platforms, some are missing platforms altogether. Portsmouth Harbour’s platform 2 was decommissioned during the refurbishment required to stop the whole station sinking in the mid-90s (presumably someone had shouted “get in the sea” at it). What remains of it is little more than long hole in the floor.

The mysteriously absent Platform 2 at Portsmouth Harbour. Image: Peter Holmes/Geograph.org.uk.

It’s actually pretty common not to renumber after platforms are removed or retired: Huddersfield is missing platforms 3 and 7 (though it has a 4A and a 4B), and Edinburgh Waverley is missing 5 and 6 (there’s also an unusual ‘clockwise’ numbering system that means platform 20 is next to platform 1). If your local train station is missing a platform, why not invent a myth about it being stolen by ghosts or being part of a plot to rig the Labour leadership election?

Some stations don’t have numbers at all, generally to avoid confusion with a nearby station  with a similar name. Waterloo East has letters to distinguish its platforms from Waterloo, New Cross has letters to distinguish it from New Cross Gate, and platforms A and B at St Pancras are in fact a holdover from the old King’s Cross Thameslink station they replaced.


At one point the North London Line (now part of the Overground) decided to eschew numbers and letters altogether, and some stations just had platforms labelled East & West. Worst of all, at Oxford platform 1 is between platforms 2 and 3. These anarchists don’t even deserve trains.

Oh, and don’t even start on what order the platforms run in. Most major train terminuses number the platforms from left to right, except for London King’s Cross and Euston which go the other way because they’re so flipping special. In many places trains to London depart from platform 1, except for all the places in which they don’t. It’s almost as if they were making the British railway system up as they went along, which is, more or less, exactly what happened.

Anyway, the main point is that if you renumber the platforms at King’s Cross, you hit two birds with one stone: not only a return to a sensible numbering system that starts with 1, but the station concourse would sit between platforms 9 and 10, putting platform 9¾ in more or less the right place. As Harry Potter would say: Bazinga!

Ed Jefferson works for the internet and tweets as @edjeff.

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