Danny Graham coolly slotted the opener from Nathan Dyer's pass in the 23rd minute but Norwich were ahead within six minutes of the restart as Holt's header deflected in off Ashley Williams and Anthony Pilkington's strike ricocheted in off Neil Taylor, with Holt slotting the third from a tight angle just after the hour mark.
Holt blotted his copybook by giving away a late penalty for pulling back Williams, Graham converting, but Norwich survived a series of frantic Swansea attacks to become just the second side, after Manchester United, to beat the Welsh club on their own turf this season.
Source: PA
Source: PA