How do I tell me neighbour (politely) to go away

Thank you. I'll try that and see if it works. She's on her own for much of the day so I understand her need for company. I just wish it was shared with other people too!

Maybe as roses suggests, but also say " how would it be if I pop round to you tomorrow instead?" That would break the pattern of her always coming to you, and would also show some kind of pre arrangement. Then you could go, and say come to me if you're free on - ? Worth a try especially as you say you enjoy her company. Or even make it a weekly thing but you definitely need to knock this frequent, random calling on the head.

or, be honest and say 'not when the DGC are here' . It's a difficult one, but if it goes on too long, she will think you are happy with it and that she can drop in anytime.

say 'it's not a good time at the moment' with a smile. Don't answer the door.