So, I really admire that you are taking the bull by the horns and saving £200pcm for retirement in addition to a private pension. But £200 pcm for 25yrs is only £30k not £60k, a regular savings account isn’t going to double your money. You’d have to be earning an average of 5% interest to get £30k deposited over 25yrs to £60k- does your locked savings account pay that much?
Id encourage you to get some independent financial advice on how to grow your £200pcm savings faster because your goal of having £6k/Yr to live on starting 25yrs from now is too low. £6k/Yr in 25yrs is going to be equivalent to having £3k/Yr to live on today (assuming the rolling average inflation of 2.2%/yr over the past 25yrs but average inflation could well be higher the next 25yrs). In 25yrs, your goal of £6k will buy no more than half of what it buys today….
That’s why you really do need to go after interest and there are many many investment vehicles that will do this and are also easy to cash out…especially since you are saving for a goal 25yrs from now.
A LISA is risk free and might get your £30k paid in to a balance of almost £60k in 25yrs as a few do pay 3% interest and the government does a 25% lump sum annual top up, but you can’t withdraw from one until age 60. You can put £4K a year away in one of these.
Anyway, you’ve taken the hardest step and that is having a dedicated plan to save regularly every month, I’d hate to see this wasted by your money languishing in a regular savings account. Get some advice on how to make your money work for you at inflation busting returns.