Most UK universities offer hardship loans for students who genuinely need them. Sometimes, depending on circumstances, this can be given as a grant, which you will not be required to give back. Universities are however very strict about application for these and you will have to prove that you are genuinely in need of the money. See your university reception for more information about this.
You shouldn't feel embarassed when it come to harship loans, as if you are in financial difficulty, you should help yourself so matters dont become worse.