IST is a night stop location for some flights, so it's worth having that page bookmarked on your mobile device, there's a bit of a chance that the SCCM will get an iPad message about feedback before their return, which makes for a nice pre-flight briefing discussion for the team upon their return to LHR/LGW/LCY. More likely to work on longhaul admittedly. I try to send my compliment message just after landing at the destination.