Confession time - I just wash the potatoes and dont bother peeling them - the mash ends up with tiny brown flecks in it, but you really dont notice it. I am interested to know how you cook 1.25kg of spuds?? I find that if I do much more than 500g in the basket at once, the water bubbles up and over when they are cooking.
l too dont peel my potatoes just wash and chop up l still cook in micowave and mash with a hand held pototoe masherif the holes are small in the masher the skin goes to the bottom as you mash and the pototoe comes through the holes and its all clean no bits of skin for the kids to complain aboutmy husband and l dont mind the skin mixed with oursl will have to try in thermie as l hear it is nice