nah m8, 100% on the level
Those schemes were legit at the time (though engineered specifically to egregiously avoid tax), but HMRC clamped down hard on them subsequently.

I could go into detail about how the schemes actually worked but even I find it deathly boring.
(Smegg Wallace The O.G. Q.R., Mon 26 Jul 2021, 15:55, archived)