2032
You'll be 39
Median scenario: 2032 · Optimistic (90th percentile): 2031
From this point, your portfolio's expected monthly growth exceeds your £500/month contribution. Compounding is now doing more for you than saving is.
2057
Age 65, as set above
Projected balance: £1,259,715 median (91% of your £1,385,692 target)
Optimistic (90th percentile): £3,674,749. Conservative (10th percentile): £442,162.
2059
You'll be 66
Median scenario: 2059 · Optimistic (90th percentile): 2048
Your portfolio reaches your inflation-adjusted £750,000 target, covering £30,000/year of today's spending power. This lands after age 65, so it assumes you keep contributing past your target retirement date.