It depends from the complexity of the job.
A simple decorating job could set you at £120/day, instead a floor installation could be £250/day.
A plastering job could cost as much as £500/day for stairways with lots of corners and access issues, differently from 4 straight walls which could cost £250/day.
Every job is different and requires different skills and effort.
If I have to build a simple wooden vanity unit I factor in £120 labour=1 day.
But if the customer asks for a more complex design with carver doors and inserts, then the same vanity unit could cost £200 more.