Portfoliovisualizer has US ADR's for around 10 of the original HYP1 stocks available, but unfortunately back data is limited and only around 3 have historical data back to Nov 2000 HYP1 start date, RIO, UU, BAT.
PVFor just those three, initial thirds equal weighted, non-rebalanced, to 2022, and you can click on the Allocation Drift tab, hover the mouse at/near the end of the chart and it indicates original thirds each weightings having drifted to 14% UU, 45% BAT, 41% RIO (UUGRY, BTI, RIO respective US ADR tickers).
The summary tab indicates CAGR of 11.9% versus 7.2% for Vanguard 500 Index, where I set the start month to December 2000 and end month to November 2022
FRED
https://fred.stlouisfed.org/series/DEXUSUK/ provides Pound/Dollar historic rates. Click the 'Edit Graph' tab and you can set it to monthly, end of period ... or whatever you prefer, close that and click the Max date range, and you can download that data as a Excel. Indicates 1.421 USD per Pound at the end of Nov 2000, 1.1962 at the end of Nov 2022
So with £75,000 being invested in HYP I set the start date investment to $106,575 in reflection of 1.421 Dollars per Pounds. The final portfolio value at the end of November 2022 was $1,267,862, so dividing that by the 1.1962 £/$ exchange rate = £1,059,908
Stocks picked more due to data limits, however a old style Utilities company, mining company, and a cigarettes company yielded a reasonable total return that considerably excelled the broad US S&P500 index over the same period. More surprising was perhaps the best of those three being the tobacco company, in a transition era towards anti-smoking (banned in pubs/clubs etc.).
Yes it would have been nice to be in google, tesla, whatever did soar over the same period, but comparing to the best with hindsight is a lot easier than identifying the best with foresight.
Many of the UK FTSE 100 stocks are international/global. Basically just do their reporting in the UK, could as easily up and move to the US or wherever. I believe over 75% of FT100 earnings are now sourced via foreign activities. It's not reflective of the UK, other than UK regulatory reporting/compliance controls. Nice for the UK in the sense of having taxes paid to the UK.
Its the collective holdings of the FT100 that has caused a lag/drag factor, too many banks/whatever across a times when banks/financial-crisis hit those banks hard .. whatever.
In past times investing was expensive, a round trip buy and immediately sell again potentially could have wiped out half or more of a modest size investment amount by the time the broker, market maker ...etc. took their slice. Investors tended to pick 8 or so stocks, often preferring blue-chip stocks, and bought-and-held. Funds levied high fees and also had high trading costs, in net of taxes terms investments may have purely served others whilst yielding little for those actually taking the risk. Even today funds/investment trusts can be rip-offs, seemingly low fees, but with hidden costs that are hidden (reported, but with the details buried deeply). In some cases funds of funds, multi-layers of fees/costs, along with foreign dividends withholdings taxation etc. Dividends withholdings taxation averages around 20% I believe, so any fund holding foreign stocks has that headwind that it absorbs, and where in turn the dividends it pays to its shareholders may again incur withholding tax on those dividends. HMRC may also then apply its taxation on those dividends. A brokerage may also levy a 3% type FX conversion cost on dividends not paid in Pounds. Fundamentally the HYP style is more old-school, where investors were more aware of the high drag/cost of the alternatives.