To prove that Royal Mail takes ROYAL MAIL very seriously: The Duke’s office kindly sent a letter of thanks to the Subway team. Any regular letter would have had practically no chance of finding us – but this one did because it was franked by the Buckingham Palace post office.

Not only that, the Subway doesn’t actually have a postbox and the postcode used was wrong. Originally the letter used the postcode of the Crystal Palace Station, they changed it to the Crystal Palace Sports Centre and redirected it. Ultimately it found its way to the Crystal Palace Park Rangers who tracked me down.

So effectively the letter was addressed to ‘Karl in Crystal Palace’ and it found me because of the insignia on the envelope and lots of conscientious people along the way – amazing!

And the letter…