Simplify the following text for a Grade 7 native English-speaking person.
Original: The stadium underwent significant redevelopments in the early 2000s , which increased the capacity from 22,600 to a current figure of 30,311 , making it the largest capacity football ground in East Anglia .
Simplified: This increased the number of people it could hold from 22,600 to 30,311 . It is the largest capacity football stadium in East Anglia .