I do know what a Running Total is but I think yours underestimates costs.
So basically that bills and food would probably take about half your [do you mean My- yours?] income - or less, as excluding my mortgage I spend about £600 per month on the equivalent. So that gives about £1500 a month for petrol, holidays etc. Not paying your mortgage anymore is a pretty massive difference for most people, as will be not paying for a season ticket for commuting etc if that applies to them.
But what you spend as a single person is not the same.
£600 a month for all food and all bills is very low.
Many couples spend £600 a month on food alone (£150 a a week including everything, not just food) and bills- you need to itemise fixed outgoings like house insurances, council tax, water rates, car insurances, car services, fuel, phone, TV licence (or subs), and other costs like dentists (2/3 visits per annum), hairdressers (per annum) , clothes, gifts for birthdays and Xmas. .
Before we retired we did a spread sheet based on a year of outgoings. To have a basic lifestyle we needed £25K. This is the same amount, as it happens, that is listed in a lot of retirement planning websites.
So yes, OP with around £35K pa and no mortgage is doing okay but it's not mega bucks.