My colleague has recently announced retirement soon from an already skeleton team. This means the team will be even smaller and more responsibility/pressure will be put on me and the other members of the team. I'm the newest member by a long way and learning a lot still.
With the extra work and responsibility is it appropriate to ask for a raise to recognise this? If so, at what point: Before or after the retirement?
More info: I am the least senior. There are two seniors above me. There will be no direct replacement for this person due to the unique skills they possess. The work will be divided between the rest of us.