This route is suitable if you want to make a passive investment into the UK. The basic requirement for the initial three-year visa is that you have £2m available to invest in a regulated bank in the UK or overseas, and the money is disposable to invest in the UK.
You must invest the money for five years in the UK.
The money must be invested in UK government bonds, unlisted equities or loan capital in active trading UK companies.
You must also make the UK your main home and spend over 50% of your time in the UK.