Im a workaholic - if I dont, who will?

Good luck with your treatment @Kezz.  First thing I said when I was diagnosed was “I’ve just got a new job and I’ve got a holiday planned can any treatment be delayed”!!! The holiday was canned but I was able to work through the bulk of the 15 months of treatment, in total I think I had about 5 weeks off including 2 for surgery.  

It can be done but it’s hard especially after chemo treatments.  I was office based though and I get that it’s not always possible for people to keep going, I wouldn’t have been able to do a physically demanding job.  Like @LucyE  for me it absolutely helped my mental health and my colleagues were more supportive than others close to me.  You can ask for modifications to your work role to reduce the pressure and you need to avoid sick people which isn’t easy in any workplace.