What comes first plaster or new kitchen units?

Hi as the title says. we are going to do up our kitchen. the roof has to be fixed first but what i was wondering do we get the walls plastered first or get new kitchen units in first? dont want to cause damage to new plaster. thanks in advance

Plaster (and paint) first.

You will never get a good finish around the units the other way.

You'll also have a hell of a job if you change the units at some stage in the future.