Scholarships?
Universities in UK are usually funded by the government which results in slender funds available for the university to distribute amongst students, either as scholarships or bursaries. Some universities have certain awards which are given to students based on their performance during the course or their merit. As an Indian student you have access to certain special scholarships. These are exclusive of the ones offered by individual departments.
The British government also undertakes sponsored awards like the Chevening Scholarship Commonwealth Scholarship, DIFD Scholarship. Because these scholarships are extremely competitive in nature, you must make application for the same in advance.