I would be suprised if this was possible. A freehold resting on another freehold ? Owning a freehold means the enveloppe and footprint of one building.
It's possible to create flying freeholds (i.e. a freehold above another freehold) but it's fraught with problems and something anyone sensible avoids like the plague. There are flying freeholds in Lincoln's Inn, but they've governed by an Act of Parliament to resolve any potential problems.
There's no reason why the freehold has to be the entire building though. Sometimes a block of flats can be split between two or more different freeholds. It's known as a 'split reversion'.
It's possible to create flying freeholds (i.e. a freehold above another freehold) but it's fraught with problems and something anyone sensible avoids like the plague. There are flying freeholds in Lincoln's Inn, but they've governed by an Act of Parliament to resolve any potential problems.
There's no reason why the freehold has to be the entire building though. Sometimes a block of flats can be split between two or more different freeholds. It's known as a 'split reversion'.