This article explains about work placement regulations for Tier 4 students whilst studying in the UK.
Am I eligible to do a work placement as an international (non EU) student?
Tier 4 students can complete a work placement during their studies in the UK. However, there are conditions that must be met:
If the placement meets these conditions, you can work full-time or part-time on a paid or unpaid placement.
Will the time spent doing a placement contribute towards the time I am allowed to study in the UK?
Yes, it will. If you remain on a Tier 4 visa during your work placement, this time will count towards the limit of five years that you may spend studying in the UK.
For visa information and guidance, please refer to Tier 4 extension information.