I actually thought UK were devoid of any Amphetamine. And relied solely on Methylphenidate for treatement of AD(H)D in kids but not adult's. So that's good news on both the avaiabilty and indication for adults. I assume you must be adult right? You are not a ten year old with +1000 post's on Bluelight right
And misinterpretaded your text thinking you ment dextro-Amphetamine wasn't available in the US.
There's plenty of street speed in the UK which is regular amphetamine sulfate, but unfortunately it's usually bashed to shit and mostly contains caffeine. You got people paying next to nothing per gram but that's because they need to take a gram at a time to get anything from it there's so much cut!
These days though our favourite street stim is coke rather than speed, so coke is much easier to find on the road, is higher quality especially on the DNM, and is what you can expect everyone to be boshing on a night out.
As for the pharma amphetamines, it is as a general rule hard to get regular dexamphetamine from the NHS. But well if you can afford a private ADHD specialist assessment for adult ADHD (which these days you can get done online for just £250, which is a fucking bargain since when I saw a specialist in person the insurance had to cover a £1000 bill) you can easily get dex.
My doc first gave me Concerta (time release methylphenidate) but it had horrible side effects so I just honestly told him this. He told me to come in the very next day and put me on Elvanse (the UK brand name for Vyvanse). I took that for a few years before I asked my NHS GP for dex instead so I can control how much of the stim I get in my brain every day. Got switched over no problem.
Few years later my mate went through one of the online services and did a video chat assessment. He was initially given Concerta but like me complained of its horrid side effects. The specialist then simply offered him a choice of what med he wanted next: Ritalin IR, Elvanse, or dexamphetamine. He of course chose the dex.
He had more trouble getting that script transferred over to the NHS though. While I literally just showed my GP the private script and had an NHS version printed out no questions asked, his GP wasn't so chill, and I heard later from mine the rules were toughened up a bit since I got my first script. So my mate's GP had to get authorisation from a board of local doctors to cover his arse before approving the script which, in typical NHS style, took months. My mate was put on Elvanse at first even though the private script was for dex, but later was able to get switched back to dex from his GP.
If you went the pure NHS route you'd be on a waiting list for fucking years (no I mean literally years), but once you got to see someone you'd easily get Elvanse no problem. Dex is harder to get, it's a hit and miss thing and depends entirely on the doctor you're seeing. Private specialists don't mind handing it out but whether the NHS will accept that recommendation is at their discretion. Often an NHS specialist only likes to hand out Concerta or Elvanse. They stick only to time release stims a lot of the time.
Just to be clear if the NHS refuses your private specialist's recommendation, you can still pick up the scripts privately, you just have to pay a fortune to do so. One box of 28 dex is around £150 from the pharmacy. Which is just pure profiteering when the NHS pays £20 per box for the exact same medication. Insurance won't help you either, private health insurance in the UK only ever covers medication when you're in hospital. They never cover the cost of outpatient meds.
Other private scripts can work out cheap though. Example the NHS prescription charge is currently £9. If you pick up a private diazepam prescription you will probably pay around £5 for a box. I actually once got a private diazepam script delivered to me by a bloke on a motorbike and paid £7. Still worked out cheaper than the NHS!
Why then is dex so much more expensive? No idea, I'm guessing it's because diazepam is far more mass produced as there's way more prescriptions for it. Economies of scale innit. NHS price is likely so low because they benefit from bulk ordering.
But yeah dex remains very rare in the UK. People will happily pay over a hundred quid for a single blister pack of 10.
Elvanse is far more common but still demands a similarly high street value.