|Newark Boys Chorus, 2018|
Here is a YouTube sample of their singing back in 2009. The Chorus is trained at its School (NBCS).
The tradition of starting a Boat Race Dinner with the American and British national anthems was begun at the Washington, D.C. dinner (the only one that competes in size with that of the New York City dinner), and is now a fixture.
The NBC team will sing one other song besides the two anthems.
More details on the dinner, including a link to registration, are here.