If andonly if you had an OpenReach 5C master socket like the one pictured and your extension sockets were workingbefore BT or EE switched you over to Digital Voice and now they don't then this should work for you.
eBay
Compact Monocular Telescope 8X20 for Adults Portable Handheld Mini Monocular with Smartphone Adapter for Bird Watching Fishing
Aliexpress UK
NEW The adapter is suitable for use with EE home phones and accessories, and is perfect for those who want to stay connected while on the move. With its easy-to-use interface and high-quality sound, you can enjoy seamless communication with your loved ones without any hassle. Order now and get your hands on this must-have accessory for your home phone.
eBay
SVBONY Universal Cell Phone Adapter Mount Support Eyepiece Diameter 25-48mm for Binocular Monocular Spotting Scope Telescope
Aliexpress UK
eBay
SVBONY Universal Cell Phone Adapter Mount Support Eyepiece Diameter 25-48mm for Binocular Monocular Spotting Scope Telescope
Aliexpress UK
eBay
Monocular Telescope Upgrade 2000X24 HD Monoculars for Adults With Phone Adapter Pocket Monoscope Binoculars for Stargazing Gifts
Aliexpress UK
The BT Digital Voice Adapter X16-G90 is a white adapter designed for use with UK standard three-prong phones. It allows you to easily connect your phone to a digital system and provide high-quality sound. The BT brand ensures reliability and compatibility with your existing phone setup. This adapter is a convenient solution for improving your home phone experience. Great condition Please see pictures
eBay
SVBONY Universal Cell Phone Adapter Mount Support Eyepiece Diameter 25-48mm for Binocular Monocular Spotting Scope Telescope
Aliexpress UK
BT Digital Voice Adapter Phone Range Extender Only Works With BT And EE Digital Voice Service. Manufacturer : BT. BT Digital Voice Adapter. Only works with BT Digital Voice Service. Compatible devices: BT Hubs.
eBay
BOYA BOYA Mini Wireless Lavalier Lapel Microphone for iPhone Android Type-c Smartphone DSLR Cameras Youtube Recording Streaming
Aliexpress UK
HDMI Adapter Cable for Phone to TV, 1080p HDTV Connector Cable HDMI Adapter Cord, MFi Certified Lightning Digital AV Adapter Compatible for iPhone 14/13/12/11/XS/X to TV Projector Monitor. 【1080P HD Co Frequency Transmission】: This H-D-M-I Adapter Cable supports 1080 high-definition co frequency transmission.
eBay
Godox MoveLink Mini LT UC Wireless Microphone 2.4GHz Transmitter Receiver Lavalier Mic for iPhone Type-C Smartphone DSLR Camera
Aliexpress UK
Model : Panasonic KX-TG2521E. Type: Charging Base. Colour : Grey. If you are unsatisfied with our products. Ending Soon. Product Details.
eBay
VIJIM LS25 C-clamp Flexible Desktop Light Stand Microphone Holder Live Boom Arm With 1/4"3/8"5/48" Ball Head for DSLR Smartphone
Aliexpress UK