The school's head teacher says the annual energy bill has risen from £70,000 to £210,000.
An increase of £140,000 a year on the school's energy bill could see it go bankrupt in a year's time, head teacher Rod Sims said.
Mr Sims said turning the heating down to reduce energy consumption in the school would only make "a minimal difference".He told the BBC in recent times the school had "definitely become more of a support system". Mr Sims said the school had also put a second-hand uniform scheme in place, under which former pupils had donated their uniforms.
"We are supporting schools with £56.8 billion this year in core funding, which includes a cash increase of £4bn, and continue to work with the sector to understand pressures."
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