I suggest you read what the loo roll manufacturers have to say in such as Manchester. Article in mail.
They are geared up to cope for fluctuation,
They see no reason for stockpile.
The biggest threat is the lunacy of acceding to the idiocy of (such as) shutting down schools, so the useful people in the economy have to stay home look after kids. Interruption of manufacture and supply of essential materials would be a disaster.
We need can do mentality.