CLASSICAL MUSIC / Upbeat: Round the horn

EASTER at the Barbican means the British Horn Festival, and the massed ranks are back there again today. For buffs it means a chance to hear some of the great names and catch up on new trends. This year there's a demonstration from the revived narrow-bore horns of the New Queen's Hall Orchestra. Unwary members of the public should be warned that they may run into strange things: one year hundreds of the instruments played Mozart's Ave Verum Corpus, and lunchtime today threatens a Parley of Pea-shooters.