Right, lets try a sensible answer.....
Moving a main head and meter is a job for the electricity supplier, cost varies on existing cable route- if it's a pull back the cost is less, if it needs extending then the cost is more.
Most will leave the meter and mains head where it is and look to move the CU and provide new tails from CU to mains head / meter.
Then there's the services on the CU to move.
If you have (say) 3 ring mains, 3 radial circuits and a couple of light circuits, each of these has to be either pulled back and rerouted or extended (again depending on new CU location compared to old location).
Then there's earthing to consider and updating to current regs for the whole installation and finally a full test and issue of Part P docs. The work is notifiable.
Some cables are likely to be pull backs, but work on the worst case basis would mean extending them all or re-running then to the 1st parts of the rings or radial points.
Crimping is a god send in these situations and providing it's done with professional tools, sleeved in heat shrink or self amalgamating tape and fully tested then it's a perfectly acceptable 'fix'.
Only a survey will qualify the amount of work, but it's very unlikely to be more than a few days work, especially it you help by opening up the underfloor routes between old location A and new location B.
The few days could be more if the job involves the usual silliness associated with laminate and tiled flooring, the condition of the existing installation (if more than 20 years old) could have a heavy impact as might the updating of earths and the system to IEE 16th