Could someone provide information on why BA 32 from Hong Kong is cancelled today, June 30?

BA's completely useless IT - a friend on this flight was automatically rebooked onto a Japan Airlines flight from Haneda to London 2 days later, with no flight from Hong Kong to Haneda included.

No other options available to rebook online - so had to call in as the flight is in a few hours - however he kept getting hung up on by the call center - because "we are receiving an unusually high volume of calls". Madness