My cynical ass cannot stop my eyes rolling into the back of my head when I see "tax breaks for billionaires". But I'll try to put that entire ugly can of worms to the side for now.
Ultimately the devil will be in the details as to how this is implemented, and unfortunately at this stage it seems there's not a whole lot of information as to exactly this will work. From the article: "There’s still uncertainty around how the government will approve eligibility for the projects. [...] adding more guidance is due to be provided in the near future."
I've got so many questions. Like, how much of the land has to be rewilded? Will this land be regularly monitored and checked? How are we going to decide whether or not a plot of land has been sufficiently rewilded? Can the landowner do any sort of rewilding even if it's unsuitable for the surrounding area and it's needs? Is there anything to stop someone from simply creating a monoculture conifer forest, which doesn't provide a great benefit for wildlife?
Are there any measures in place to stop land owners from demolishing these rewilded areas after it no longer becomes profitable to keep them that way? Can someone just create a monoculture conifer forest and then cut it down for timber once the inheretance has gone through on the land? Is there going to be a cap on the tax break itself? If the tax break ends up saving more money than the cost of rewilding an area and then demolishing it afterwards then this is just going to be another way for billionaires to dodge taxes whilst contributing nothing to the UK.
I'm skeptical to say the least.