How to convert your Brick

I recently purchased a Groove Tubes Brick from the US as they are not available in the UK. The instructions and all of the advertising states that the unit is internally switchable for UK voltage. This is not true and it needs to be rewired. Fender (who now own Groove Tubes) were not very helpful with telling me what to do so I had to figure it out with my Dad. As others might have the same problem, my Dad has written out instructions on how we converted the brick. These were for somebody else who asked me how to do it so I thought I would make it available to all! My Dad and I are obviously not held responsible for any exploding Bricks, just trying to help with some information!