My sick note states i start back on the 3oth jan but its my day off , do i need to ring work to tell them i will be back as normal on the tuesday and take my monday off as normal?
Yes, ring them up and tell them you're fit to come back in but its your RDO and you'll see them the day after :) Make sure you do this BEFORE your RDO though (i.e. on the Friday or Saturday)