Should i wait till i receive end of year results if my predicted grades for UCAS are not good enough to meet course entry requirements?
If you get poor predicted grades then that can hamper your initial ucas applications. If they are so poor for your target course then it might bot be worth applying.
Predicted are only predicted and the important ones are the real grades.
Rarely you can get them to change a predicted if you give enough evidence.
In any event focus on getting the real grades and your studies.
If you get the real grades in August you can apply ucas and use extra or clearing.