I'm going to miss names and questions, but posting from a different time zone, truly zonked today as DH snored like the proverbial last night...
I use a cheap cafetiere from Tesco and brew fresh coffee. Ground coffee is always on offer, and Aldi do a really decent flavoured bag for less than £2. That's takeout coffee taste for a fraction of their prices. Use a flask if needed.
I do the same as many here. I simply deduct what my total monthly outgoings will be, from income, and work from that. It can help to budget for birthdays, Christmas, motor costs too on a monthly basis.
Stop ANY irrelevant direct debits and review the ones you have for best value, even a couple a month. Use cashback sites.
Ebay or sell unwanted stuff. Clothes go well if they are from higher end high street.
Most supermarket own label brands are fine, keep a few things that are branded that you love.
Packed lunches from home save a fortune. Meal planning ditto. One meat free meal a week too if relevant. One 'cheap' meal like jacket spuds or omelette works well too.
I've got DH, and DC (17, male, human dustbin and 15 DD) and I reckon my budget for food, cleaning products etc is £150 pw, a touch more if entertaining. We are not on the bread line, so it could go tons lower than this.
Had our meal cooked at our table last night, Japanese, it was amazing both visually and in terms of taste. I'll post a picture.