There is a Q & A on the BBC News website and this question seems to fit your scenario.
https://www.bbc.co.uk/news/world-asia-china-51176409
"My four daughters live in London and they have come up for Eid. Do they have to go back or can they stay?
From Parvis in Stockport
If you live in the affected area, you cannot host people from outside your immediate household - this includes members of your family, such as your daughters. The only exception to this would be if your household is already in a support bubble with one of them."
The Regulations relating to Leicester state
"Restrictions on movement
5.—(1) No person who lives in the protected area may, without reasonable excuse, stay overnight at any place other than the place where they are living or where their linked household is living.
(2) No person who lives outside the protected area may, without reasonable excuse, stay overnight at any place within the protected area other than the place where their linked household is living."
I would think the NW Regs would be similar, meaning your daughter can visit as long as she is linked only with you and no-one else.