I could use a little diet help please (Steedie

), my current goals are cutting to finally get rid of my pre gym fat.
My BMR is 1790
Height 68"
Weight 177lb (80kg)
BF% around 18-20%
LBM 143lb
I work out 4 days a week doing wendler as my main weights routine currently and 15 mins hiit 2x a week and 2x core workout + mobility the rest of the week.
I have an office job so very little activity other then the gym.
my diet has to be convenient (no fridge, or microwave at work) and reasonably cheap (current cost for my food is approx £15 per week), while helping me hit my desired macros, currently the diet looks like this.
Breakfast: 7:30am
muesli 50g
milk 200ml
Mid Morning Snack 10:00am
300g chicken + sauce
Lunch 12:00
slice of brown bread
50g peanut butter
10g nutella (purely a taste thing for me)
Banana
Afternoon shake 14:00
2 scoops protein
50g oats
during the day snack
25g nuts
Pre training totals:
Protein 138g
Carbs 154g
Fat 61g
Cals 1729
Evening meal:
As my wife is a child minder we tend to have whatever the kids are having. Very often one of the following:
Lasagne, Garlic Bread, Veg
Spag Bol
Meatballs, boiled potatoes, veg
Sausage Casserole, veg, potatoes
Sheppard’s Pie, veg
Fajitas
Chicken Curry, Rice
Chicken Pie, Veg, Potatoes
Fish cakes, Beans, Potatoes
Due to the variation i allow the following for dinner
Protein 20g
Carbs 50g
Fat 20g
Cals 500
At weekends my diet is all over the place, most weekends I will at least try and stick to my macros through the healthiest easy option but sometimes this doesn’t happen
My totals are as follows
Rest Day
Protein 158g
Carbs 205g
Fat 81g
Cals 2229
Training Day
Protein 177g
Carbs 251g
Fat 83g
Cals 2510