If you've just come back from a taxing, tiring orchestral tour, as has the London Philharmonic, the last thing you want to face is a programme of four tough works which demand, at the very least, bright-eyed vigilance but more often a tense, finger-wrecking articulation. So the players must have been relieved to find firm hands on the wheel in the shape of the electrifyingly assured Finnish master Jukka-Pekka Saraste and that most intelligent, repertoire-curious of solo violinists, Frank Peter Zimmermann.