I found this on the website of Kazuki Yamada's "other" orchestra, the Monte Carlo Philharmonic. The tenets are diametrically opposed to those of the CBSO.
" Food and beverages may not be consumed in the concert hall. 6. Photography and recording It is strictly forbidden to film, photograph or record. Mobile phones must be switched off for the duration of the show."
Is he happy with a foot in both camps?