Joshua Levine

And I think that's remarkable, actually.

And all of this set up in such a short period of time.

When it mattered, they could do it.

And it also gives you a sense of what the authorities had to set up quickly, how the economy had to change, how industry had to change, how everything had to be changed when a very large portion of the British public were now living in France.

Many, many ways to die in a trench.

So, I mean, I suppose...

You've got to make the point that the trench was relatively safe.

If you were going over the top on an advance, you were in a great deal more danger.

But there were many ways to die in the trench or indeed at night coming out of the trench.

So I suppose your biggest danger on a day-to-day basis was artillery.

So the trenches would all be, they wouldn't be straight.

they would be zigzagged.

And of course, if you think about it, that makes perfect sense.

You'd have these traverses.

And the idea being that if a shell exploded in the trench, the force of it couldn't go all the way down.

It would be broken by these crenellations, if you like.

And it also meant that if somebody got into your trench, enemy got into it, they couldn't fire all the way down.

Or indeed, if a group got in, they couldn't just run all the way down.

They were sort of held up as they moved along.

So