"We were shocked to learn the derivation of the term 'R*dskin,' pertaining as it does to the historic abuse of native Americans," the letter said. "The exportation of this racial slur to the UK this autumn, when the Washington team is due to play, directly contravenes the values that many in Britain have worked so hard to instill."
Smeeth also explained that the game could be an issue for the BBC, the publicly funded company that's scheduled to broadcast the game.
"Given it's taxpayer-funded, if we believe it's a racial slur, then that means problems for the BBC in terms of coverage of the event," Smeeth told ESPN. "There is going to come a pressure point. The last thing the NFL wants -- after putting so much behind its brand in the UK -- is a good number of us to begin putting pressure on the BBC in terms of what they're showing and how they're showing it. This is not the image the NFL wants portrayed in the UK."
The game could also create a problem for Wembley Stadium, which "has strict regulations against the use of racial slurs and chanting at its events and is owned by the football association, which has taken a strong stance against racism in sports," the letter states.