Lawrence was furious at the decision, having felt that Furlong was forced to make the infringement, especially after a close decision went against the Bath man minutes earlier that gave Ireland another three points.
Farrell and Borthwick emerged separately for the second half, which saw chaos instead on the pitch as a host of tries swung the pendulum back and forth.
Ireland can claim the Six Nations title with victory at Twickenham and put themselves within one match of history, as they are on the verge of being the first Irish team in history to take back-to-back Grand Slams.
