grandson punished by not being allowed to visit us.

Regardless of the lock down issue, I think this is a very harsh punishment for a young child for telling a lie. As someone has already said it will encourage him to lie. He's only seven fgs.

Wrong on so many levels
What merlot and others have said.
He is not allowed to come and stay with you,
You are not allowed to provide his childcare while parents work
If his father is going out to work he is not on lockdown and if you all live together I fail to see how the question of a sleepover at yours arises.

What if any, part of “lockdown” are you observing?

Lockdown seems reason enough.

Sorry I’m confused how does he visit you when you are all on lockdown together? If parents are not on lockdown as they work it makes sense for them to stay with the child and none of them visit anyone at all!

This idea of lockdown seems flexible. Not sure how that works.

After the update, you being a carer for the child does not entitle you to have a call on how he is raised by his parents.

If the parents work then you are not all on lockdown and they seem to be able to manage with childcare this weekend.

Also it is their child therefor their rules.

The rest of us are all missing our grandchildren too because they're not allowed to visit us! And that has been the case since 23rd March which is one month. I can only assume you've been under a rock as it has been plastered endlessly on the TV and radio that you cannot mix outside your own household.

1. You are not a third parent for the kid.
The disciplining and parenting of the child is carried out by his parents, grandparents have no call
His parents dont also owe you any time with the child or have any informal custody agreement with the grandparents.

2. Why is your gc sleeping over in the middle of a pandemic?

Seems harsh to me and sad for you. Children do lie. If he expects a big punishment he is likely to lie even more .
Someone needs to talk to him about the reasons for telling the truth. Sounds like mum is a bit frazzled and having given the punishment needs to stick to it.
I remember an incident when my kids were that age. No one would own up and then the person who didn’t do it said she did it. I only found this out 30 years later !
You need to save face on all sides. Negotiation is necessary. Also I’m thinking mum would like a break from him this weekend too ! I wonder if she could strike a bargain.

Someone obviously didn't get the memo.

we have been on "lockdown" together since the beginning of March, before lockdown was official, we were on vacation together and returned together to be in lockdown and I am carer when both parents work schedule clashes as well (essential workers). Sorry you felt the need to "judge" as I omitted to put additional details down.

Surely children who do not already live with grandparents are not allowed to visit them at all during Lockdown?

He shouldn't be visiting you this weekend anyway. Haven't you noticed we're on lockdown?

Good God, what does it take to get the message through to some people?