I rent out a room to a lodger. Even with that, my overall income is around £10k less than the OP (in London, so doesn't go far either).
I'm very fortunate that my parents recently helped me out with a big essential expense.
My savings are depleted to almost nothing. I don't have high childcare costs as DC are secondary/older primary.
I get by by doing what I've always done, but not saving anything. I also borrowed from DC's savings for the big essential purchase, so I'm repaying them rather than a loan. Without that I might be able to save a little.
No coffees out, no meals out, using reward points for as much as possible, take my own lunch to work, packed lunches for DCs. Very cheap mobile phone deals. Buy almost all clothes second hand. And other things, too. I always look to see if I can get something cheaper secondhand before buying new. Walk as much as possible rather than take car or public transport. No gym membership. Free activities (go for a walk, park etc) at weekends. I do pay for Amazon Prime, Netflix and an XBox pass. Occasionally think about dropping Amazon or Netflix, but think they are worth the cost overall and I couldn't entertain the DC for less anyway. Meal planning, buying reduced items where possible, cooking from scratch.
I think about money all the time.