Sure! Here are the suggested answers for the blanks:

1. **primary school**
2. **secondary school**
3. **vocational college**
4. **university**

So the filled text would read:

Anne: Hi there, what do you know about formal education in the UK?
Barbara: Sure, well in the UK, formal education starts at **primary school**, which is typically for children aged 5 to 11.
Anne: And what happens after primary school?
Barbara: After primary school, students go on to **secondary school**, which is usually for children aged 11 to 16.
Anne: What options are there after secondary education?
Barbara: Well, some students may choose to go to a **vocational college**, which teaches you how to do hands-on work in jobs such as mechanics, carpentry, plumbing, and construction. Others may choose to continue academic study to prepare for **university**, which is a form of higher education.