Get your figures from the pension company then work it out on a simple spreadsheet, or a piece of A4 if you don't do basic spreadsheets. I have four schemes, two that are more traditional defined contribution for most employers (if lucky) then two average salary defined benefit. My first pensions went into a defined benefit for about 10 years (two merged) - USS (University Superan). The next two were a typical me/employer putting into Aviva etc. My current has been running 18 years into a LGPS scheme, so good (like the first).
The two 'spare' schemes (2 and 3) have done well, so I converted to drawdown, took 25% tax free this year and bought a van for a massive lifestyle change for us. These still have a good chunk put away and won't be touched. My old USS scheme, ran the numbers, and as I've not contributed to it for 25 years, and my salary was much lower back then, it made very little difference to draw down the 25% now and the monthly pension from 55. Had I waited till 67, I'd have an additional £100 a month - I'd not have got the tax free and 12 years pension (taxed) and would never made that difference back - even if the pension post 67 was tax free - I'd had to be 90 to have evened out.
I still plan to work until the adult kids leave home, and thats not likely for at least 5 years as a minimum. I don't plan to stay till 67, absolutely not. I've seen too many retirement plans go poop up. You don't need a lot to get by. My wife's pensions are shoot, she's not worked for companies that put much in. She's currently semi-retired, only doing a day a week at minimum wage. We manage fine on this.
Just run the numbers