Companion wanted for elderly lady in her early 90s

Single Room (ideally female)
It is on behalf of my grandmother who has become very lonely recently since my grandpa passed away in July. She likes to chat and form a friendship. We are ideally looking for someone who would be home obviously not too much as she sometimes has friends there, but would be nice to be home a bit - to keep her company and interact with her. Chore wise it would be good to maybe make her the odd cup of tea for yourself too and hopefully be a caring person if she needs anything. She has limited mobility. It is a small 2 bedroom flat in Finchley area.

The person would have a single room and private toilet but then a shared bathroom.
It would really suit someone who would improve her quality of life and be warm, friendly.

So...in essence - there would be NO RENT or BILLS to be paid but in return the person would be expected to provide companionship to her and to hopefully take her out in the wheelchair and be there to talk to her.
The room itself has a wall unit that we can either keep or remove. We are looking to put a desk in and also a single bed unless applicant has their own bed they want to bring.

Available...ASAP
Of course, all things in the room now would be taken out