Hi !

Hope you are doing well.

To study in the world’s top 200 universities in the UK, IELTS score requirements are much more stringent. Nearly about IELTS 4.5 (4.0+ in all skills) for University foundation, IELTS 6.5 (6.0+ in all skills) for UG degree and IELTS 6.5 (6.0+ in all skills) for masters degree. But if you are going for a job in UK you just need a offer letter from the company and Visa of UK that's it. No need to give IELTS, But it is good to give IELTS to know more about your communication skills.

Hope this helps.

Good Luck!