If you’re using BTRFS and know how to/are prepared to learn, just create separate sub volumes instead of multiple partitions. Means that you don’t need to decide how to split up space between different partitions and they are easy to delete without a live USB.

Infostealer malware is so popular currently that even Microsoft decided to release one

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I went through Psychiatry UK for mine and they were fine, although from your link it seems they are currently one of the longer waiting lists, so I would suggest trying someone else with decent reviews. I didn’t need to wait long (maybe a week) for my referral to be confirmed, unlike the other person in this thread.
I would suggest making sure that the provider is a yes on the “Authorised to provide NHS ADHD Medication Prescriptions”. You can sign up for an NHS pre-pay certificate once you are getting regular prescriptions to save on the prescription payment.