Here are some websites that offer free online courses in the UK:
1.
Khan Academy (https://www.khanacademy.org/)
2.
Coursera (https://www.coursera.org/)
3.
edX (https://www.edx.org/)
4.
Open Learn (https://www.open.edu/openlearn/)
5.
Future Learn (https://www.futurelearn.com/)
6.
Alison (https://www.alison.com/)
7.
MIT Open Courseware (https://ocw.mit.edu/)
8.
Stanford Online (https://online.stanford.edu/)
9.
Open Culture (https://www.openculture.com/)
10.
Open Yale Courses (https://oyc.yale.edu/)
11.
Class Central (https://www.classcentral.com/)
12.
Udemy (https://www.udemy.com/)
13.
Skillshare (https://www.skillshare.com/)
14.
Code Academy (https://www.codecademy.com/)
15.
ed2go (https://www.ed2go.com/)
16.
LearnStreet (https://www.learnstreet.com/)
17.
Duolingo (https://www.duolingo.com/)
18.
Taught by a Pro (https://www.taughtbyapro.com/)
19.
Solo Learn (https://www.sololearn.com/)
20.
Open Sesame (https://www.opensesame.com/)
21.
Learn to Code (https://www.learntocode.com/)
22.
Study.com (https://www.study.com/)
23.
Open Learning (https://www.openlearning.com/)
24.
Learn Direct (https://www.learndirect.com/)
25.
Future Learn (https://www.futurelearn.com/)