Not that interesting bar the fact they do a mid rise version. Which will turn a S type bike to M type bar height. Presumably also make an M type more like an S type (I've not done the Maths).
They also have a wider hand area so if, like me, you don't have child hands, you can fit proper grips.
Possibly old news but SJS now sell these third party Brompton bars:
https://www.sjscycles.co.uk/handlebars-riser/?brand=joseph+kuosac
Not that interesting bar the fact they do a mid rise version. Which will turn a S type bike to M type bar height. Presumably also make an M type more like an S type (I've not done the Maths).
They also have a wider hand area so if, like me, you don't have child hands, you can fit proper grips.
Quite cheap too.