I was going to put that they were hand assembled by Nepalese mountain pygmies, but thought it wasn't politically correct!
Where are the SLX range of poles manufactured? - This is not an easy question to answer as the answer is 'all over the world'.
All of the components are designed in the UK and all of the poles are hand-finished in the UK. Many of the components are also manufactured in the UK.
There are a total of 52 components in a typical SLX25 pole, brush and hose assembly - 28 Components are from the UK, 16 from China, 5 from Japan & 3 from Europe. They are finally assembled in China and the UK.