Can already think of a few bits you’ve maybe missed like car tax, any breakdown cover you may have etc- sky looks high, I’m assuming you have internet bundled in so you could maybe swap to standalone internet and get something like Netflix instead which would likely be cheaper? However I think by the sounds of it there’s probably either more payments that are small but add up that you’ve not mentioned (for me that ends up being different streaming services, Xbox Game Pass type stuff) or you spend the ‘leftover’ money carelessly.
Also, holy shit your water bill! I live in a terrace and we have baths/showers daily and is only £40pm for us?!
I totally get it, life is kind of shit for a lot of people at the minute because everything costs a bomb and I hate it when people say ‘oh well don’t buy a coffee before work!’ type stuff because everyone needs little things to cheer them up and feel like they’re not working to barely scrape by, but that’s kind of what helped me when money was particularly tight last year. Little unnecessary expenses, getting lunch at work costing £5 a day when I could have packed one, a gym membership no one ever used, it all adds up.
You really could do with going on your online bank back to your last payday, taking out all your necessary bills and then seeing where the rest of the money went. It can feel kind of embarrassing or upsetting if things have added up and you didn’t notice, but it’s really the only way to know what changes you need to make. No real point cutting back on a £3 coffee twice a week if you’ve spent £100 on ‘top-up shops’ without realising or £40 on a load of subscriptions you forgot you had etc.