Many firms conducting complex litigation now use a “team” approach to running their files where an experienced fee-earner supervises one or a team of more junior fee-earners and certain tasks are delegated.  When costs come to be dealt with, in my experience, this usually leads to a complaint by the paying party that inter fee-earner discussions between the senior and more junior fee-earners should be disallowed.  If you are faced with this argument then a useful authority is TUI UK Ltd v Tickell.  The court found that in principle where junior fee-earners had done much of the work under supervision then it was necessary for there to be inter fee-earner discussions from time to time.  Although the litigation in question related to disappointed holiday makers I think that the principle would apply to other litigation also.