Cherry laurrel - brown leaves

Hello,

I planted some cherry laurrels in the summer as a hedge. One of them is going brown and the leaves are droopy.

There is no mold or fungus on the leaves. There are no brown spot type patches - just whole brown leaves. They come off if I touch them but are staying on otherwise.

Please can you help?

Thanks

 

I'm no expert on Laurels, but I think it may be some sort of food deficiency in the soil. Do you know what soil they are growing in, sandy, clay etc?