Just got the simplest phone I could get on the market for an elderly relative - the Vodafone (Sagem) Simply VS1 - big phone, well spaced out keys, simple to use - even the manual is written for the non technical!)
And the best bit - €49 Ready to Go with €80 credit (€20 immediately and €10 a month for 6 months)
The relative is well happy. (Bear in mind there is no camera no extras no nothing on this phone except phone calls and texting!!) He is getting about a week standby on it as well whilst using the phone each day.