It's a lot of charges for stuff, but I suppose it's hard to get out of some. For example, if you need the car for work? But if you have any savings could you buy an older car outright? Ours is a 10 year old Ford fiesta, looks and runs fine and doesn't cost us much in repairs. Not suggesting you buy one that old though probably. But a 5 year old?
There is a lot of digital stuff to pay, WiFi AND Internet, why? And your phone bill of £132 a month is a lot, is part of this paying off the handsets? I suggest when you reach the end of the contracts don't get the latest phone, and swap to Giffgaff or Smarty. DH and me pay £5-6 each per month. Are you remembering to Switch to WiFi when you're home?
Gym is optional of course. Do you actually use it? A lot of people pay and end up not going.
You could probably get food bills down a bit. Could you have beans on toast or plenty of soup with nice bread for dinner say twice a week?
You haven't put in your rent or mortgage, money for clothes or going out etc. Christmas, birthdays, dentist opticians. All the infrequent things that still come around regularly. I suggest looking on Moneysavingexpert.com.