i am not knowledgeable in this area but i do know my way around reliable sources of information when it comes to medicines.
firstly, i would not encourage anyone to experiment with medication without an MD taking responsibility to overwatch.
secondly, i found more than one source reference i esteem scientifically of reliable value where the recommended dose is definitely not twice a week.
each take his responsibility to his own.
Well, I've been on TRT for the past 4 years or so - and I'm an avid student in all fields that concern me - as a result, I have become more knowledgeable in this area than your typical MD. That's not an exaggeration. Additionally, I've cycled several times - so I'm familiar with many of those regimens, with side effects etc too.
About your UK link - that's ABSURD advice - administering 1ml of Sustanon 250 once every 3 weeks... pure madness. Sust 250 has a half-life of less than 5 days. This means that after 21 days, you're down to about 5% of the peak. Ridiculous. The peaks and troughs will be a horrible roller coaster. That is lazy NHS advice to down-manage the frequency of patient visits. Also, 250mg over 3 weeks is only 80mg per week - that's roughly 2/3 of optimal TRT dosage for most guys. But it's the extreme peak and near zero level at the end that makes it bad. You can plot drug availability here: http://steroidcalc.com/
Solice has far more experience than I have, but he's more practically inclined - I don't know if he enjoys reading medical studies too.
That said, Europe and the UK are rabidly phobic (there is no other suitable term) of male hormones. The practices in the UK are notoriously backwards in this field. Although it could be worse, you could live in the Nordics.
Anyone claiming anything other than twice weekly injections is engaging in medical malpractice - unless they're talking about the rare and exceedingly pricey Nebido version of testosterone which has an extremely long-acting ester. But it's a total rarity. And would certainly be totally useless for a Thailand tourist looking for a quick boost - which is what OP asked about.