I'm going to apply to Wirral RO for a new certificate, so will ask for a photocopy of the original. I'm going to get it sent to me in Singapore so may take some time but at least I'll have everything with me.
I totally agree its very strange why Marjorie kept her mother's name ie Crowe and didn't adopt the name Carrington, as even today a child would change their surname to be that of their adoptive parents. I'm fairly sure she kept the name Crowe up until she got married.
But the fact that on the census they had written 'adopted' child confirms the fact they did adopt rather than foster.
Yet another mystery!
Lisa