MainCore 15m long White BT Telephone Extension Cable Lead For Office & Home 6 Wire (631a) BT Male to BT Female (Available in 2m, 3m, 5m, 10m, 15m, 20m) (15m): Amazon.co.uk: Electronics
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 – 10m | Keple.com