Mould on Seats

[N1dg3l]

Accidentally left a window open a few mm and weeks later I came to use the van and there is black mould on the seats, any tips for removal and prevention?

 

[WelshGas]

Accidentally left a window open a few mm and weeks later I came to use the van and there is black mould on the seats, any tips for removal and prevention?

Autoglym Interior Shampoo.