Can I insist ?
My contract says weekly attendance is 30 hours. Otherwise I'm being penalised for being on rehab (due, by the way, to an injury caused by the job), as well as my rehab being put back as I was s'posed to be on light duties this week (yeah, right. That lasted all of 1 day !), then going out on the bike for an hour a day next week, 2 hours the week after, etc, and that won't happen if I'm in an MC. OH have "advised" the injury was caused by cycling hence the weaning back on to it.
Oh, not to mention the "messing about" with my day(s) off. Last week the rota said I was off 2 consecutive days (working 4 x 7½hrs as it has been for the last few weeks, rather than the 5 x 6hrs it will be at the MC), was changed to Tuesday, now looks like it'll be Saturday.