As of my last knowledge update in January 2022, I don't have specific information about Oakfield Preparatory School in the UK. The details of specific schools, especially smaller or local institutions, may not be extensively covered in public sources.

If "Oakfield Preparatory School" is a relatively small or local school, you might want to consider the following steps to gather more information:

1. **Official Website:** Check the school's official website for the most accurate and up-to-date information. School websites typically provide details about the curriculum, admissions, faculty, and other essential aspects.

2. **Contact the School:** Reach out to the school directly. Schools often have contact information available on their websites, and you can inquire about any specific details you are interested in.

3. **Local Education Authorities:** If the school is publicly funded or part of a larger network, you can contact local education authorities or educational boards for information.

4. **Parent Reviews:** Look for reviews or testimonials from parents and students. These can sometimes provide insights into the experiences of those associated with the school.

5. **Visit the School:** If feasible, consider scheduling a visit to the school. This can give you a firsthand look at the facilities, meet staff, and get a sense of the school's environment.

Keep in mind that specific details about Oakfield Preparatory School, such as its curriculum, admissions process, and any recent developments, may have changed since my last update. For the latest and most accurate information, reaching out to the school directly is recommended.