Get some supportive vest tops . Pull down firmly. Advantage is no hooked gusset - impossibly fiddly especially as you get older.
I have lost weight successfully over three years by simply eating less, habitually. After a while, you really don't want to eat large meals. I have come down three dress sizes and still eat cake every day. I can't take exercise because of osteoarthritis so reducing the calorie count is the way to go. Avoid weight watching clubs. You just become obsessed with food. Weigh regularly, eat simple breakfast ( porridge with ground linseed and skimmed milk every day for me). If still rushing out to work, then take some oatcakes with you. Suck your stomach in regularly throughout the day.