UPDATE: 28/10/2018 – John Williams is doing well and will return to Los Angeles shortly (read news)
According to breaking news received from the Royal Albert Hall, John Williams has fallen ill on his arrival in London and has had to be hospitalized. According to official sources, his condition is not severe, but he will not be able to conduct the concert that was scheduled for this Friday, October 26th at the Royal Albert Hall. The concert will be celebrated, and instead, Dirk Brossé will be in charge of conducting the London Symphony Orchestra.
Here you have the full official statement from the Royal Albert Hall:
We wish a quick and complete recovery to maestro John Williams!!