All applications to study for a full-time Higher Education course at Universities and Colleges in the UK are made through the UCAS, an online application system available www.ucas.com
There is an application fee for this service.
All UK schools and colleges are registered with UCAS to manage their student's applications. You will need to obtain a 'buzzword' from your Tutor or Careers advisor, which you will need when you register with UCAS.
This establishes the organisation from which you are applying and allows your referee to attach your reference to your on-line application form.
You pay for your application either by Credit or Debit card online, or by paying your School or other registered centre who will then pay UCAS.