A previous topic asked the same question.
See uk-tier-4-student-visas/scholarship-swi ... 23766.html
See my specific replies on Sat Jan 21, 2017 10:51 am about who does not need a consent letter and on Fri Mar 30, 2018 7:17 pm about consent letters for entry clearance applications.
I do not give immigration advice. I refer you to Immigration Rules, guidance, other online content and to your sponsor.