Originally Posted by Littlegirl

From what I understand, Mixed Fleet crew request where they would like to work but the CSM makes the actual decision and would be expected to try and get a good spread of experience across the cabins and doors for safety purposes.

When rostering cabin crew, the computer treats anyone who has done more than six months as experienced, as this is the legal stipulation for CAA purposes, so although a CSM will try and have a good spread of experience (and of course at least one or two on each flight will be FTCSMs, so will definitely be experienced) sometimes it is hard for the CSMs, as sometimes the system gives them a fairly inexperienced crew to work with.

I am sure whenever possible they will do as you say and make sure that one of the crew in First is experienced enough to guide the others in the cabin and of course on many flights all will know what they are doing I would hope.