Rewiring is a full replacement of an electrical installation. To know wether or not you require one we recommend you have a EICR carried out to ascertain the safety and deterioration of the installation, the reason for this is many times we hear "my electrics are working perfectly so i know they are fine" your electrical system might be working and you may have never seen any issues but that doesn't mean there safe. Electrical wiring just like car tires are in some way a consumable but they just last longer, on a typical family home i would expect the wiring the wiring to be last 30 years depending on installation method used and power consumption.
As it's a ground up rewiring of the electrical installation wiring and accessory/items you can chose the location and quantities of your sockets and switches and what the control while staying within the regulations, we also recommend while having this done to pre-wire for anything that you may have installed in the future like a EV charging point, Air-conditioning, ground source heat pumps and garden office/outbuilding etc.
Theres no easy way to carry out rewiring of a electrical installation, it is a very messy and disruptive job as it involves chasing of walls which even with the dust extraction we use isn't a 100% effective again the dust, lifting of floorboards and cutting into ceilings.
A surface wiring installation is where we using cable trunking fixed to the surface of the walls to contain and manage the wiring it is the lest disruptive way to carry it out but the trade off is its the lest atheistical pleasing and can be a eye-sore in a domestic enviroment.