Why are calculators not allowed in C1?

The harder the maths, the less the need for a calculator

Because there's more algebra and trig using regular values?

Because there is more algebra

I worry about A Level students who jump to the calculator too quickly

Even if there is a need to "evaluate" that really should only be done at the end of a question

The boards could test the same level of understanding without the use of a calculator for the vast majority of the material covered

I suppose so, thinking about it. Even things like binomial expansion could be done mentally (or on paper).
I'm just trying to think of a topic where it'd have to break down but I'm drawing a blank but would you say it'd be hard to do that in stats?

Ok

I agree that some parts of Stats do need calculations that would be better with a calculator

But then, I do not really think of Stats when I think of Maths (oooo controversial)

I can understand GCSE maths because that's (mostly) everyday maths but A level?