You can eat anything 5g or under, so adapt your meals, change the way you cook. 
Remove the butter, oil etc buy lean cuts of meat, cut the fat off meat, you can roast chicken but don't eat the skin.
Use skimmed milk in your mash, increase your veg and fruit intake 7 per day 
Cook by grilling, baking in foil, use fry light (spray oil) in a low- med heat, poach not fry.. 
1/4 meat, 1/2 veg not including potatoes, 1/4 some sort of carb .. 
WW meals are within rules most of the time, plus most of "healthy" ready meals are ok 
Eggs are ok for most people, bisto gravy is ok too ( even tho it's a bit higher) 
Read your labels 
Hairy dieter books have great recipes 
Breakfast - protein will keep you fuller for longer
Turkey rashers/ bacon - Sainsbury be good to your self is ok 
Myfitnesspal web/ app for counting kcals 
Start at 1800/1500 and then a few months later you can lower it  down again 1300/1200
Don't get fooled by the high sugar low fat items - they can stall your weight loss. 
Once you stop eating biscuits and cakes you will have sugar withdrawal symptoms / try to have Berries and fruits with low fat yogurt to help with the cravings as the cravings will pass 

. 
Hot chocolate with skimmed milk - check the labels of the hot chocolate drink 
Do not eat anything over 5g per 100g or you will get tango'ed !!  No takeaway is worth it!! 
If eating out asked for grilled meat - no extra oil added, dressing in the side or no dressing - I used to take my salad dressing in my hand bag lol  always asked how they cook things - so you can ask them to do it differently for you.  Most places don't mind!