I know this is not for everyone, however, it's a service not many people know about...
I'm dyslexic and have been using it for years, instead of phoning 118 etc call 195 and get the number/get put through to as many numbers as you like!!
Anybody who might find using a phonebook difficult (dyslexic people, people with ME, memory loss etc etc) can get this service, all you do is call 195 and ask for a form to be sent to you and get it signed by your GP, send it away and then you get a unique passcode so everytime you call 195 you quote it with you name and get any number for FREE!
Text phone users can call 0800 838 363