On the towel warmers, the on/off button is placed at the bottom right, can I get the on/off button on the left instead?

Unfortunately not. However, you can turn some of our towel rails upside down so that the on/off button ends up at the top left. Remember to mount the towel rail at the appropriate height, so that you can reach the on/off button.
NOTE! This only works on towel rails with item no. FK700, FB700, FK701 and FK702.