Far easier to show with photos, but here goes
- 2 x trox screws on underside of cowling
- lift cowling off by moving it slightly back and fore and pulling up.
- this will expose 1 torx at the back holding the speedo in place
- remove the flexible sleeve that goes between the speedo and the steering cowling. That will expose a further 2 torx screws
once the above is done the speedo will lift out of its space. You can then release the elctrical plugs and take it out of the car.
The clocks themselves can be taken apart by releasing the clips all the way around to pop the front off.