If not aware - uk government is backing Roll Royce to produce small reactor solutions (SMR). And Rolls is going around the world signing up sales agreements for them.
The underlying tech though is yet to be proven, so some risk won’t deliver on time/to budget/at all.
The problem isn’t the technology, it’s the economics.
The assembly and economies of scale for “mass production” have not been proven in practice; who will you sell the countless expensive ones before it gets cheaper?
And the smaller reactor has diseconomies of scale working against it for the electricity it produces. So the $/MWh price is much higher than for larger reactors.
The underlying tech though is yet to be proven, so some risk won’t deliver on time/to budget/at all.