Apple Arcade refund & Apple One iCloud storage

Review the information provided here:

• Do I get a free trial? And what does it include? Any subscriptions you don’t already have are free for the first month of your Apple One subscription.* If you currently pay for any of the subscriptions, you will continue to be charged for them separately until the Apple One trial is done and you switch to a paid Apple One plan. After the free trial, the plan automatically renews as a monthly subscription. And there’s no commitment — you can cancel in Settings > Apple Account at least a day before your monthly renewal date.
• How do I switch between individual subscriptions and Apple One subscriptions? Transitioning is easy. Simply follow the steps outlined above to sign up for Apple One. Any existing subscriptions that are included will automatically become part of your Apple One plan and you will no longer be billed separately for them. One exception is if you have an existing iCloud+ plan that includes more storage than your new Apple One plan — in that case, you will continue to be charged separately but you can cancel it. Tap or click here to learn more. If you cancel your Apple One plan at any time, you’ll have the opportunity to select any individual subscriptions you would like to keep, and you’ll be billed separately for them. Your subscriptions will all continue right where you left off — you won’t lose customized content such as Apple Music playlists or Apple TV queues.
• What if I need more iCloud storage? You can purchase additional iCloud storage separately to supplement what’s included with your Apple One plan. Learn more

Apple One - Apple

Based on what I saw in another thread, I believe that

• You will get a pro-rated refund for the part of the £6.99 subscription that you didn't use. But you will only get the refund after the Apple One trial.
• During the Apple One trial period, you will not get free Apple Arcade service. Because you already had an Apple Arcade subscription, you will be charged for that, and I believe you will be charged at full price (not a discounted price that reflects the bundle discount).

Also, I pay £2.99 per month for 200GB of icloud but Apple One only comes with 50GB. Will I have to continue to pay the £2.99.

Assuming that you want 200 GB of storage, the answer is Yes – unless you'd rather pay more to get an Apple One Family subscription.

What happens to your iCloud storage when you sign up for Apple One - Apple Support

Will I get 250GB?

If you had both an Apple One Individual subscription, and a 200 GB iCloud+ subscription, I believe so.

1. If you don't separately ask for a refund, no; otherwise, it's at Apple's discretion. Note that the individual service will automatically be cancelled when the Apple One payments begin.

2. If you choose to; see #3.

3. Yes, if you keep paying for both.

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