The Exiles, who retain the international origin trophy courtesy of victory in last year's inaugural one-off game, were dominant in all areas of the game, with the biggest threats coming from the oldest players on the field in 34-year-old Brett Hodgson and 38-year-old Steve Menzies.
Skipper Hodgson scored two of his side's six tries and kicked four goals for a personal haul of 16 points while winger Francis Meli also touched down twice.
It made for an inauspicious start to the post-Jamie Peacock era, leaving McNamara with little option but to revert to the tried and trusted for the end-of-season triangular series with Wales and France.
McNamara's decision to rest four regulars, with three others unavailable, including the newly-retired Peacock, gave his side an experimental look and few seized their big chance to impress.
England's new half-back pairing of Danny Brough and Matty Smith did little to enhance their prospects after being outshone by the Exiles duo of Scott Dureau and Daniel Holdsworth.
At least Hull winger Tom Briscoe justified his recall with an industrious display while Huddersfield's Eorl Crabtree and Leroy Cudjoe caught the eye on their home ground, the former with his powerful bursts and offloads and Cudjoe with his telling defence.