The Nationals were led by Austin Kemp and Ethan Nother who each had a goal and two assists.
Max Vinogradov's power play goal midway through the third stood as the game winner.
Brenden Trottier also scored for London.
The Nationals now face the Chatham Maroons.
Lambton OPP will have an increased presence in Grand Bend as they continue to search for a swimmer that was reported missing on Friday.
The Toronto Blue Jays blew out Seattle 8-1 to open the weekend series
The beach at Pinery Provincial Park was posted as unsafe for swimming heading into the final weekend of August.
Black Gold Brewery in Petrolia is looking to thank the community for its ongoing support while also raising awareness for local charities during its annual block party.
A celebration will take place on Saturday afternoon, from 1 p.m. until 3 p.m., at Imperial City Brew House.
The matchup between the London Knights and Erie Otters is taking place on Saturday at 4 p.m., and is a fundraiser for upgrades to the Brooke-Alvinston-Inwood Community Centre.
