As expected, United Kingdom was really strict ever since when it comes on paying Taxes. They're also the country I've only known that conducts KYC on all businesses under thier jurisdiction.
Were they strict in the beginning? As far as I remember it took a very long time for them to actually address the legalization concerning holding Bitcoin and whether you need to pay capital gains or only pay taxes once you have converted to a fiat currency. I wouldn't say they are strict either, they require you to pay your taxes like any other capital.
I'm not particular with BTCs and other Crypto holders, I'm entirely pertaining on how UK work on regulating a good system when it comes on paying taxes compared to other countries.