UK Geographic number portability begins with the Gaining Communications Provider (CP) receiving a request and, where appropriate, a Letter of Authority from the end user to port a number(s) to that end users new supplier.
This request is then sent onto the Losing CP, either directly or through one or more intermediary wholesale partner operators for acceptance. Then, the port is either accepted or rejected. If accepted, a specific date is provided when the port will take place.
Sounds simple right?