To become a personal trainer in England, you can follow these steps:

1. Get qualified: To work as a personal trainer, you will need to hold a recognized fitness qualification. Consider completing a Level 2 Certificate in Fitness Instructing and a Level 3 Certificate in Personal Training from a reputable provider such as YMCA Awards, Active IQ, or CYQ.

2. Gain experience: Once you have obtained your qualification, look for opportunities to gain practical experience working with clients. Consider volunteering at a gym, shadowing an experienced personal trainer, or working with friends and family members.

3. Specialize: Consider specializing in a particular area of personal training, such as weight loss, strength training, or sports performance. This can help you to differentiate yourself from other personal trainers and attract a specific clientele.

4. Get certified in first aid: Personal trainers should be certified in first aid to ensure that they can respond effectively in the event of an emergency.

5. Set up your business: Consider setting up your own business as a personal trainer or working for a gym or fitness studio. If you decide to set up your own business, you will need to obtain liability insurance, create a business plan, and register with HMRC for tax purposes.

6. Continue your education: To stay up-to-date with the latest developments in the fitness industry, consider continuing your education by attending workshops, seminars, and conferences.

7. Build your network: Building a strong network can help you to attract new clients and grow your business. Attend networking events, join professional organizations, and use social media to connect with potential clients and other professionals in the fitness industry.

Overall, becoming a personal trainer in England requires obtaining the necessary qualifications, gaining practical experience, and building a strong network. By specializing in a particular area of personal training and continuing your education, you can increase your earning potential and build a successful career in the fitness industry.