I'm 69 kg and 166cm (I think that's just under 11 stones & 5' 6" in old-fashioned measurements)
I do one very intense training session per week in the gym, + a PIlates, + 2 Pump classes, plus walk everywhere (so around 15,000 steps per day).
I count calories via my FitBit app. It's the only way - I've lost around 12 kg over the last year, fairly painlessly.
I keep away from white carbs - so don't eat pasta, pizza, rice, or white bread (or maybe only once a week for a treat).
Breakfast: I eat either raw oats with skim milk, or a 2 egg omelette with 2 tomatoes and 3 or 4 lumps of frozen spinach + about 20g of cheese
Lunch is usually a lot (500g) of pretty solid soup - I love the Sainsbury's Dahl soup, or the Moroccan soup with chickpeas.
Supper is stuff like a grilled chicken breast with salad, lots of tomatoes & grilled peppers (I'll eat 2 or 3 tomatoes and at least 2 peppers) or a slab of salmon fillet plus loads of broccoli & grilled tomatoes, or around say 70g of steak, griddled, with peppers & tomatoes, or in a salad with a finely sliced mini gem lettuce to soak up the steak juices.
Treats are the Fage 0% fat yoghurt with honey, and the best cappucino in the town (from the gym I go to).
Snacks: avocado, yoghurt, berries, or eating 4 small meals a day, so not snacks really.
One day a week is a "cheat day" and I drink wine maybe 4 nights a week.
As you can see, I eat a lot of vegetables and lean protein. I just don't keep sugary or snacky stuff in the house. I cook from scratch every day, but you could batch cook a whole lot of chicken breasts, for example. I tend to buy frozen spinach (the whole leaf from Iceland) and broccoli. It's then easy to put in a steamer while you grill the fish or meat.