What are Guides and Brownies called in England?

In the United Kingdom (England, Scotland, Northern Ireland, Wales), the organization is called Girlguiding UK and members of the organization are called Girl Guides.

As for the different age groups, they are:

Senior Section ages 14 to 25

Guide ages 10 to 14

Brownies ages 7 to 10

Rainbows ages 5 to 7