My husband's daughter lives with her Mum. Despite the fact that children can move between houses, he chose not to take the risk and she stayed with her Mum throughout lockdown. He is in a high risk job and sure enough we both got Covid, and were floored by it for weeks, so his decision was justified. He's made the same decision during this lockdown but now not even his phonecalls to his daughter, she's 10 so via her Mum, get answered as her Mum disagrees with his decision (usually she will do anything to stop him seeing his daughter) She bubbled with her Mum for childcare and they are going round multiple people's houses during lockdown. We do not mix with anyone and have no desire to make a chain of however many houses mixing. Has anyone got any advice of what he can do to keep a relationship with his daughter?