Whether you are of school leaver age or an adult, depending upon your circumstances you may be able to apply for financial support to help you during your studies:

All further education courses are free if you are a UK resident and aged 16, 17 or 18 on 31st August in the year you start your studies. Depending on your circumstances, you may qualify for a bursary or free college meals.
Financial Support for Students aged 16-18

Many financial packages are available to help lower the cost of learning and depending on your circumstances, courses may be free or available at reduced prices. To receive financial support you must comply with nationality and residency conditions, age rules and previous study rules
Financial Support for Students aged 19+

If you are aged 19 or over and thinking about studying a further education vocationaltechnical or professional course at Level 3, 4, 5 or 6 from September 2017, you may qualify for an Advanced Learner Loan to help you pay your course fees. Don’t forget, if you choose to study an Access to Higher Education Level 3 Diploma and progress to/successfully complete a degree/higher education course, the balance of your Advanced Learner Loan will be written off. This means your Access course could be free.
Advanced Learner Loans (Students aged 19+)

A variety of financial packages are available to support full and part-time students through their university studies
Financial Support for University Students