ASNQ BT Telephone to RJ11 Cable Long 2m - BT cable 2 Pin Wire 6P2C ADSL Modem Phone Plug Male Broadband Cable, Extension Lead for Landline, Modem, Fax, Dial-up White : Amazon.co.uk:
4-Wire Telephone Cable RJ11 (2m) - Cablematic
BT Telephone Line Cable Adapter from RJ11 Socket Female Jack to BS6312 431A Male Plug | British UK Modular Standard Connector to 6P4C for RJ11 universal lead | 4 Wire Converter | White | Keple.com
A Complete Guide to Telephone Cable
BT Phone Line Plug to RJ11 Crossover Telephone Cable Extension | Lead Cord for Modem FAX SKY box Virgin Hub | British UK BT Socket 4 Wire | White – 5m | Keple.com
1STec 20m Roll of Genuine BT CW1415 Dropwire 11 Overhead Single Pair Outdoor Telephone Drop Wire Main Line Cable + 2 Entry Grommets and IDC Insertion Tool (20 Metre): Amazon.co.uk: DIY & Tools