vauxall corsa 12v not srtarting?

hi my son has a corsa 12v when it was running it lacked power we replaced the battery after it had been standing for a year only to fi nd it ran for a while then cut out ,it started a while later but then stopped altogether and will not start at all,new fuel has been put in but no go ,could it be elrctrical or fuel ,fuel is being pumoed up to the carb but nothing can you help

richard
September 2017