It looks like they used to be located in King’s Heath, Birmingham in the 1950’s (which used to be part of Warwickshire before West Midlands became a county). One of their more famous products was the BarOMix cement mixer, and I know this was made in Alcester, Warwickshire up until about fifteen years ago when they went into receivership.

I haven’t seen a picture of their power barrow, though.

I have seen references to these before although all I can remember is something about there being a couple of models so a MK1 and a MK2 version?

I cannot find any reference to the machines in the archives but there is a Baromix (York Forge) advert with an address when located at Kings Heath:

https://vhgmc.co.uk/wp-content/uploads/2016/11/Allen-Scythe-and-Baromix-Nippy-1964.jpg