Thomson ReutersMarch 12, 2013 05:15
* Sterling stays near more than 2-1/2 year low against dollar
* Sterling to stay weak on economic concerns, QE bets
* Investors wary of sterling before UK budget on March 20
* Industrial, manufacturing, trade data at 0930 GMT
LONDON, March 12 (Reuters) - Sterling struggled near a 2-1/2 year low against the dollar on Tuesday as investors and speculators refrained from buying the British currency which stayed vulnerable to poor economic data.