You are told at the first conversation which of them will lead your case, and that does not change without us telling you.
If your case touches two areas of law, both lawyers work on it and the more senior of the two answers for it.
A small firm where associates carry their own cases early and appear on the advice they draft.
We recruit selectively across associate, trainee and support roles. Send a short note, your CV, and a line about the kind of work you want to be doing.
If you already know who you want, say so. If not, describe what is happening and we will match you with the lawyer whose area it falls in.