Scottish and Southern Energy said on Wednesday it would cut gas and electricity prices for its 7 million customers, the first cut in six years.  “We are now monitoring costs and evaluating how we will be able to pass savings on to customers,” said SSE’s energy supply director Alistair Phillips-Davies. “I hope we will see a sustained downward trend in the prices paid by our customers.”   British Gas owner Centrica said in December it would cut household prices for gas and electricity this spring, in an attempt to keep customers after losing nearly a million last year. Comparison website Energyhelpline.com said energy suppliers were too slow in passing on the benefits of lower wholesale gas prices to customers, urging them to switch suppliers.  “Wholesale prices have fallen by 50 percent over the six months and further falls of about 20 percent are expected this year, but so far no one from the energy companies has put an exact figure on how much they will cut prices by,” said Energyhelpline’s Paul Green.