Labour shadow energy minister Tom Greatrex told ITV Daybreak that more nuclear generation would help insure against an over-reliance on gas power.
"If we decide not to go with nuclear, then we're left in a world where we're going to be more and more reliant on gas," he said.
"When you look at what the energy companies have been saying is the reason why they're putting up prices significantly, it's the wholesale price of gas.
More top news
Intruder makes a splash at Diving World Series when he leaps into the pool from one of the diving boards in front of an unimpressed crowd.
A massive fast-moving wildfire in upstate New York has ravaged around 800 acres in forests as officials battle to contain the blaze.
Interpol has issued a global alert over the threat posed by the "diet pills" that claimed the life of a British woman.