Also check if the phone has a Speakerphone option. My late mum had hearing difficulties, and found it much easier to hear a conversation on Speakerphone than with the receiver to her ear.
Hi, I was walking on Abbey street beside Wynn's hotel and there is a hearing place. They have a cordless phone in the window advertising very loud speaker volume for just your situation. Perhaps drop in a see a demo? ~70 euro I think.
Thank you, TTI for your interest. Looks like my type of item. Unfortunately I am located at 'the last port of call of the Titanic' Do you have the name of the shop so that I can phone get them on the web.