I tried to get ours down last month and by the end of the month I was quite bored and uninspired to be honest.
Beans, lentils, yellow sticker food, tins...
I fully appreciate many people are on the breadline and need to be frugal, but I think you're actually doing really well OP.
We easily spend £200 a month on 2 adults, 2 kids and a dog. That will include some treats, some free from foods (DD has allergies) and a bit of booze. I feel guilty sometimes getting the treats and booze, but I'm lucky enough that we can afford it for now.
I've also been using the JamDoughnut app to get cashback on my grocery shops, and I've finally convinced DH to get the Tesco clubcard so we're getting more vouchers from them.
If anyone is interested in the JamDoughnut app, I've found it brilliant. You load a voucher when you checkout, and you get 3-4% cashback into the app. My referral code is QNEZ , which I think gets you a couple of extra quid too.
I do sometimes feel a bit awkward standing at the til as the voucher loads, but when I'm getting a few pounds every time, it's bloody worth it!
I've decided my money I've saved is going to a Beauty Advent calendar this year :D