Are UC sanctions set amounts for set periods of time ?

[Sanctionamounts]

If so, what are they ?

Or is at the discretion of the work coach ?

I think it is meant to be a set amount for a set time period, but people are people and it will be determined by your work coach. They just click a different button.

Not true. Some sanctions are fixed such as walking out of a job with no good reason and some open ended until the person attends an appointment again if they have just vanished with no explanation.