Cable organising

Anyone building a bespoke office desk will be faced with the issue of how to organise the plethora of cable and flexes associated with a modern office, notably for computing equipment. Any commercially obtained office desk is likely to have a hole in one corner of the worktop to allow the passage of cables from a keyboard / mouse / telephone / desklamp etc etc, and this will be lined with a plastic 'grommet' or desk cable tidy. These typically have an inset adjustable cap, to accomodate different sizes and bundles of cables, and are deliberately large enough to accept a standard UK 13A plug: