FXStreet (Edinburgh) - The British pound is gathering further steam vs. the dollar on Tuesday, now pushing GBP/USD to daily peaks near 1.4350. GBP/USD firmer post-CPI figures The pair is trading in session highs following auspicious inflation figures in the UK economy, where headline consumer prices have gained 0.2% on a year to December and advanced 0.1% inter-month. Spot has thus extended its renewed upside momentum above the 1.4300 handle, rebounding sharply from recent multi-year troughs in the 1.4230 region. GBP/USD key levels The pair is now up 0.58% at 1.4325 and a break above 1.4464 (downtrend from 1.5232) would open the door to 1.4596 (20-day sma) and finally 1.4947 (high Dec.24). On the flip side, the immediate support lines up at 1.4233 (low Jan.18) ahead of 1.4230 (monthly low Apr.2010) and then 1.4049 (monthly lows Jan.2010). For more information, read our latest forex news.