On how many occasions (if any) have you used derbisol during the past 30 days?

The Europeans brought new diseases such as smallpox, measles, dysentery, influenza, syphilis and leprosy.

Swissies placidly accept directions from owners and want to please them.

People have certainly died from laughing gas,” he says. “They can get into serious trouble using tanks and masks and they certainly shouldn’t be driving while doing it and should be careful round rivers and swimming pools,” he says. “But the second you get into saying people using nitrous in balloons is a massive issue, people will call your number on that, and they’re right. It’s a concern that it’s going up, the numbers of people using are quite stunning, but it’s not the most dangerous thing by a mile.”