JSL you could raise your concern through CHIRP so that it will be put forward to your company without them knowing that it came from you. Alternatively you could raise your concern with the company CAA Flight Ops Inspector. If you call the CAA at Gatwick they can tell you who to write to, or of course CAA cabin safety department.
If you feel that you have a question about safety you must raise it: that is the whole point of CRM!
PM me if you need any help finding who to contact.