The milk has run out in the mustard-coloured stand but some visitors love it

On the day the Prix de l'Arc de Triomphe returns to Longchamp, the sky is a funny colour and so is the new grandstand.

Aesthetically, this was a building always destined to divide opinion. Due to its innovative shape it looks like a construction made of Lego, while it has been painted all over in a shade of Bird's Custard. It's also some way smaller and less charming than the construction that began to be bulldozed the day after Golden Horn won in 2015. Even so, what we have now is certainly striking.

It is also facing the most severe test of its life, with tens of thousands of racegoers, many of them from Britain and Ireland, using it for the first time.