Use Class for Frozen Yogurt?

[BigGingerBob]

Hello,

I am wanting to open a frozen Yogurt establishment in my home town in Devon.
There is a choice of buildings from shops to cafes that are available but I am wondering about the use classes.
Would a class A1 be sufficient for the sale of frozen yogurt? People would sit in to eat and also take away.

Thanks in advance.

[BigGingerBob]

That's what I was thinking but it only mentions hot food.
Do you know how involved it is to change the use on somewhere?