NewsgalleryAccrington schoolgirl Halle Carnall's letter of advice to the Prime Minister goes viralBookmarkShareNewsByAlex Bell-ACC17:14, 20 MAY 20151 of 4The letter sent by Halle Carnall, 11, of Accrington to PM David Cameron2 of 4Halle Carnall, 11, of Accrington who has sent a letter to PM David Cameron3 of 44 of 4