Ocado was the standout gainer on the index after BNP Paribas Exane upgraded the online supermarket to 'neutral' from 'sell', saying it sees a lack of further negatives. The bank said Ocado's outlook and market sentiment now appear "much better aligned" and that it was the right time for a rating upgrade after a sharp underperformance. Croda was also a high riser, having tanked at the end of last on the back of a profit warning.