The scandal, and Triesman's immediate resignation, came two days after David Beckham had presented Fifa president Sepp Blatter with England's 1, 752-page biddocument.
The biddocument said Hull was "finding its place in the UK, a city coming out of the shadows and re-establishing its reputation as a gateway that welcomes the world".
The new Cardiff City Stadium, Llanelli's Parc y Scarlets and the Liberty Stadium are suggested venues in the Welsh FA's biddocument and Newport's Spytty Park could be used if it be upgraded to meet the tournament criteria.