You may need permission to work if you are from Croatia or outside the EU. If you are on a Tier 4 visa, you may work up to 20 hours per week during term time and full time at Easter/Christmas – though 16 and 17 year-olds have a restriction of 10 hours.
It would be simple if there were standardised rules for all students looking to study in the UK, but that simply isn't the case. You need to ensure that you check and satisfy all of the criteria before you commit to a course.
If you'd like a consultation regarding your eligibility and the process required for obtaining a student visa, you can email our visa team for a free assessment here