Newcastle Thunder will take on Oldham in the Betfred League 1 play- off final after defeating Doncaster 34-4 in the Preliminary Final at Kingston Park. Doncaster came away with a 20-6 victory at Newcastle in the Qualfying Final two weeks ago before falling to a 22-12 reverse to Oldham in the second semi-final last week. But Richard Horne's side could not replicate the win on their return to the north-east as Newcastle stormed to a comfortable win courtesy of Kieran Gill's hat-trick. Newcastle will travel to Oldham's Vestacare Stadium with a place in next season's Betfred Championship at stake, with each side registering a home win apiece during their two regular season clashes. Thunder got off to a fast start through Gill's first try of the match, which saw the on-loan Castleford Tigers winger break the club's record for most tries in a single season with his 26th score. Hooker Keal Carlile added Newcastle's second when he dived over from dummy half before Lewis Young crossed to give the hosts an 18-0 half-time lead. Former Man of Steel winner Rangi Chase got Doncaster on the scoreboard just two minutes after the restart, but that was as good as it got for the visitors as Newcastle continued to pile on the pressure. Good work from Quentin Laulu-Togaga'e helped Gill cross for his second effort before Alex Clegg also joined the tryscorers in the 68th minute. Gill completed his treble with five minutes remaining to round off the scoring, improving his season tally to 28 as Rhys Clarke kicked 10 points in the victory.