All-IP Programme
All-IP trial best practice guide (PDF, 819.5 KB)
Last updated: 21 April 2023
BPG feedback form (XLSX, 11.8 KB)
Last updated: 11 February 2020
Migration journeys (XLSX, 17.4 KB)
Last updated: 20 February 2020
Industry Principles for All-IP Migration (PDF, 177.7 KB)
Last updated: 16 August 2021
Consumer Switching
Best Practice Briefing - Switching and Working Line Takeover
Last updated: 21 March 2025
TETP (Tactical Erroneous Transfer Process) Introduction
Last updated: 21 March 2025
TETP (Tactical Erroneous Transfer Process) Industry Process
Last updated: 21 March 2025
TETP (Tactical Erroneous Transfer Process) Directory Entry Template
Last updated: 21 March 2025
Best practice guide – WLTs migrations ELT avoidance (PDF, 398.6 KB)
Last updated: 29 September 2021
Best Practice Guide – Supplier of Last Resort – Industry Process
Last updated: 07 November 2024
Industry code of practice – Special service restoration (PDF, 209.5 KB)
Last updated: 29 September 2021
Best Practice Guide - OTS with Telecare Device
Last updated: 05 December 2024
MPF ALID Help Line – Tactical process (PDF, 257.7 KB)
Last updated: 2 December 2021
Retailer IDs (RIDs) – Industry best practice guide (PDF, 193.6 KB)
Last updated: 29 September 2021
- Appendix A: COCO reports – Ofcom guidance (PDF, 353.8 KB)
Last updated: 29 September 2021 - Appendix B: RID BPG-BAU and change scenarios (PDF, 107.4 KB)
Last updated: 29 September 2021
GPLB SG Switching for Business Principles
Last updated: 14 November 2025
GPLB SG Switching for Business Process
Last updated: 14 November 2025
GPLB SG Switching for Business Message Specification Document
Last updated: 14 November 2025
GPLB SG Switching for Business Customer Matching Guidance
Last updated: 14 November 2025
GPLB SG Switching for Business Matching Validation Process Flow
Last updated: 14 November 2025
GPLB SG Switching for Business Matching Response Codes
Last updated: 14 November 2025
GPLB SG Switching for Business Asset List Guidance
Last updated: 14 November 2025
GPLB SG Switching for Business Open Orders Best Practice Guide
Last updated: 14 November 2025
Further information can be found at the GPLB Switching for Business webpage, hosted on the FCS website (please note: you do not need to register with FCS to view these documents).
Number Portability Industry Documents
Introduction to Fixed Line Porting in the UK (PDF, 380.5 KB)
Last updated: 2 February 2021
Number Porting Quick Start Guide (PDF, 197.5 KB)
Last updated: 15 April 2025
Number Porting Changes for OTS Porting
Last updated: 15 April 2025
Number Port Service Establishment (PDF, 338.0 KB)
Last updated: 2 February 2021
- App B1 – GNP Planning Request Form (DOC, 20.5 KB)
Last updated: 2 March 2021 - App B2 – GNP Switch Types (DOC, 20.0 KB)
Last updated: 2 March 2021 - App B3 – GNP SE & M Issues (DOC, 20.5 KB)
Last updated: 2 March 2021 - App B4 – GNP Generic FTP Input (XLS, 24.5 KB)
Last updated: 2 March 2021 - App B5 – GNP FTP Process (DOC, 48.5 KB)
Last updated: 2 March 2021 - App B6 – GNP PoD Process (DOC, 27.5 KB)
Last updated: 2 March 2021 - App B7 – GNP-HLSD (DOC, 174.5 KB)
Last updated: 2 March 2021 - App B8 – GNP PDI (XLS, 71.0 KB)
Last updated: 2 March 2021 - App B9 – GNP PNI (XLS, 38.0 KB)
Last updated: 2 March 2021 - App B10 – GNP Guidance Notes for completing SE Certificate (DOC, 37.0 KB)
Last updated: 2 March 2021 - App B11 – GNP SE Certificate (DOC, 34.0 KB)
Last updated: 2 March 2021 - App A – NGNP Establishment Request Form (PE) (DOCX, 21.7 KB)
Last updated: 2 March 2021 - App B – NGNP Contact Register Form (PC) (DOCX, 22.3 KB)
Last updated: 2 March 2021 - App C – NGNP Planning Form (PP) (DOCX, 22.0 KB)
Last updated: 2 March 2021 - App D – NGNP Order Forecast Form (PG) (DOCX, 22.1 KB)
Last updated: 2 March 2021 - App E – NGNP Order Form (PO) (XLSX, 36.6 KB)
Last updated: 2 March 2021 - App F – NGNP Order Form (DOCX, 23.8 KB)
Last updated: 2 March 2021 - App G – NGNP – Bulk Port Order Form (PB) (XLSX, 40.6 KB)
Last updated: 2 March 2021 - App H – NGNP – Porting Failure Form (PF) (DOCX, 23.1 KB)
Last updated: 2 March 2021 - App J – NGNP – PAP Form (PA) (DOCX, 21.7 KB)
Last updated: 2 March 2021 - App K – NGNP Certificate – Engineering Testing (DOCX, 34.9 KB)
Last updated: 2 March 2021 - App L – NGNP Certificate – ORT (DOCX, 35.0 KB)
Last updated: 2 March 2021 - App M – New CLoA (Customer Letter of Authorisation) (DOCX, 21.2 KB)
Last updated: 2 March 2021 - App N – NGNP Industry Agreed SLAs (DOCX, 21.0 KB)
Last updated: 2 March 2021 - App P – NGNP Service Establishment Test Schedule (DOCX, 76.5 KB)
Last updated: 2 March 2021 - App R – NGNP SE ORT-Test Matrix (DOCX, 47.9 KB)
Last updated: 2 March 2021
Number Port Provisioning – Core Processes (PDF, 766.7 KB)
Last updated: 15 April 2025
- App G1 – GNP Contacts Register (PDF, 81.3 KB)
Last updated: 2 March 2021 - App G2 – GNP Number Port Order Template (NPOR) (XLS, 37.5 KB)
Last updated: 15 April 2025 - App G3 – GNP S/L – Order Rejection Codes (PDF, 92.7 KB)
Last updated: 15 April 2025 - App G4 – GNP Process Automation – EDI Spec (PDF, 440.2 KB).
Last updated: 15 April 2025 - App G5 – GNP Sub-port CSV Template & Specification (PDF, 252.9 KB)
Last updated: 2 March 2021 - App G6 – GNP M/L – Order Rejection Codes (PDF, 95.1 KB)
Last updated: 2 March 2021 - App G7 – GNP Disputed Ownership of a Number – Best Practice Guide (PDF, 197.2 KB)
Last updated: 2 March 2021 - App G8 – GNP Multiline Activations-Batch Requests Process (PDF, 187.5 KB)
Last updated: 2 March 2021 - App G9 – GNP OOH Port Activations – Process description (PDF, 210.2 KB)
Last updated: 2 March 2021 - App G9.1 – Tier 1 CP Contacts Register – OOH Process (PDF, 129.6 KB)
Last updated: 8 May 2024 - App G9.2 – GNP-CP Support times (XLSX, 15.9 KB)
Last updated: 8 May 2024 - App G9.3 – GNP OOH-POR Process-Swim Lanes (PDF, 158.1 KB)
Last updated: 2 March 2021 - App G9.4 – GNP NPOR (XLS, 38.5 KB)
Last updated: 7 September 2021 - App G9.5 – OOH Pre-Order Request (XLSX, 27.5 KB)
Last updated: 2 March 2021 - App NG1 – Non-Geographic Number – Rejection Codes (PDF, 102.2 KB)
Last updated: 2 March 2021 - App NG2 – Non-Geographic Number Contact Register Form (PC) (PDF, 102.4 KB)
Last updated: 2 March 2021 - App NG3 – Non-Geographic Number Portability Order Forecast Form (PG) (PDF, 65.1 KB)
Last updated: 2 March 2021 - App NG4 – Non-Geographic Number Portability Order Form (PO) (XLSX, 38.0 KB)
Last updated: 2 March 2021 - App NG5 – Notes on Non-Geographic Portability Order Form (PDF, 75.3 KB)
Last updated: 2 March 2021 - App NG6 – Non-Geographic Number Portability – Bulk Port Order Form (PB) (XLSX, 40.4 KB)
Last updated: 2 March 2021 - App NG7 – Non-Geographic Number Portability – PAP Form (PA) (PDF, 34.9 KB)
Last updated: 2 March 2021 - Singleton and Wholesale bulk transfers – Process v2.0 (PDF, 258.9 KB)
Last updated: 14 December 2022
Ported Numbers-Cessations & Repatriation (PDF, 123.3 KB)
Last updated: 2 February 2021
Port Desk Support Windows (PDF, 172.0 KB)
Last updated: 2 February 2021
Number Port Emergency Restorations (PDF, 165.1 KB)
Last updated: 2 February 2021
- App NG1 – NGNP – Porting Failure Notification template (PF) (DOCX, 23.1 KB)
Last updated: 2 March 2021
Service Integrity for Ported Numbers (PDF, 153.6 KB)
Last updated: 2 February 2021
- App R1 – BT reporting process – Service Loss faults (PDF, 266.2 KB)
Last updated: 2 March 2021 - App R2 – OLO Fault Reporting Details (PDF, 159.0 KB)
Last updated: 8 February 2022 - App R3 – BPG – Number Ownership – Dispute Resolution (PDF, 197.2 KB)
Last updated: 2 March 2021.
Directory Listing Porting Guide (PDF, 546.8 KB)
Last updated: 2 February 2021
Number Port Emergency services (PDF, 139.3 KB)
Last updated: 2 February 2021
- App R1 – Number Portability and 999 Data (PPTX, 819.6 KB)
Last updated: 2 March 2021 - App R2 – 999 Data Feed Support Doc (DOCX, 186.9 KB)
Last updated: 2 March 2021 - App R3 – Emergency File Format Interface Spec (DOCX, 408.4 KB)
Last updated: 29 September 2021
WLR DDI Range – Block Splitting (PDF, 124.2 KB)
Last updated: 10 November 2020
- App R1 – WLR DDI Block Splitting History (PDF, 74.5 KB)
Last updated: 10 November 2020
Porting for Business Customers (PDF, 408.4 KB)
Last updated: 12 January 2021
- App R1 – BAU and PoV Order Handling Process Schematics (PDF, 503.7 KB)
Last updated: 5 November 2021 - App R2 – New CLoA Template (DOCX, 41.1 KB)
Last updated: 12 January 2021 - App R3 – PON Email Templates (DOCX, 28.9 KB)
Last updated: 12 January 2021 - App R4 – PoV Process Description (PDF, 174.3 KB)
Last updated: 5 November 2021 - App R5 – PoV Process Templates (XLSX, 30.3 KB)
Last updated: 25 June 2020 - App R6 – PoV Process Consolidated Contacts Register (PDF, 388.8 KB)
Last updated: 30 March 2026
POR Process Description (PDF, 272.5 KB)
Last updated: 15 November 2019
- App R1 – POR Alert Email Template (PDF, 116.1 KB)
Last updated: 15 November 2019 - App R2 – POR Details Template (PDF, 1.1 MB)
Last updated: 15 November 2019 - App R3 – POR Approved-EAP Email Template (PDF, 87.4 KB)
Last updated: 15 November 2019 - App R4 – POR Approved GCP Email Template (PDF, 86.2 KB)
Last updated: 15 November 2019 - App R5 – Port Override Request – Process Swim Lanes (PDF, 176.2 KB)
Last updated: 15 November 2019 - App R6 – Number portability letter to Chair NPESG (PDF, 582.3 KB)
Last updated: 15 November 2019 - App R7 – POR Activation Contacts (PDF, 113.0 KB)
Last updated: 22 March 2023 - App R8 – POR EAP Contacts (PDF, 97.8 KB)
Last updated: 22 March 2023
Passive Infrastructure Access
OR / CP Pole & Wire Separations – General Agreement & Best Practice Guide (PDF, 259.0 KB)
Last updated: 23 August 2021
Provision & Repair Best Practice (Openreach Products)
Best practice guide – WLR and MPF provision (PDF, 1.5 MB)
Last updated: 28 February 2013
Best practice guide – WLR3 repair 'in-effectives' (PDF, 555.1 KB)
Last updated: 6 May 2014
Best practice guide – Raise and manage a customer fault (PPTX, 1.6 MB)
Last updated: 30 September 2016
Best practice guide – Test accuracy charging scenarios (PPTX, 1.3 MB)
Last updated: 30 September 2016