NannyInTheKitchen
I always keep a packet of Idahoan buttery mash in the cupboard for when I run out of potatoes (just add boiling water). I sometimes think it tastes better than mine, but my Husband can tell the difference usually. 'Smash' was the forerunner years ago, but I have not tried it for years. You can also buy frozen mash, or fresh packs in the ready meals isle.
I was sent a pack of the Idahoan by Sainsbury, and found them fine. I have also bought most of the preprepared mashes, and with a wee bit extra butter also found them quite acceptable.
As a child, I remember loving Yeoman instant mash.