if your sister is here in the philippines, you need to show she has the financial capability to support you. submit orig documents like income tax return, bank statements (millions) or bank certificate, proof of properties owned (like land titles, car, house & lot), other sources of income like stocks, and affidavit of support stating she is willing to spend for your education. if she has business, include business permit, etc...
if she's abroad, bank statements for the last 6 months, pay slips, credit card statements, any remittance slip, etc..
so far that's all i can remember. check the uk embassy for other docs needed. goodluck on your appplication!
