Twin babies question for 1953 era

[C21H30O5]

In 1953, when people 'saved up' to have a baby, would it have been feasible that when twins were born (at the B'ham Maternity Hospital, QE) but weren't affordable, that one would have been kept and one given up for adoption?
My brother was born in 1953. Starting about 15 or 20 years ago, in a completely different part of the country, where I lived then, I occasionally saw a man who was the double of my brother. It used to make my insides somersault as it was such a strange feeling! One day, my daughter was with me and saw him, and she said it made her feel slightly sick as it was such a weird feeling to see 'her uncle' who wasn't her uncle! Some years later I bumped into him at work and spoke to him. It turned out that even close-up he looked like my brother. His date of birth was 3 days from my brother's date of birth. His likes, dislikes and hobbies were the same as my brother's. He was not aware of having been adopted and his mother was his birth mother as far as he knew, and he had not been born in Birmingham to his knowledge. I bumped into him once more and showed him a photo of my brother, and he agreed it looked like himself!
My brother's entries on genealogy sites is 'normal' ie no mention of a twin. Back in 1953, is it possible that a 'spare' baby, that couldn't be afforded, would have had a 'fake' date of birth and birth certificate, centred around the adoptive parents?
Incidentally, I'm no longer in that job and I've moved away from where I used to see this man.

 

[Morturn]

Hi and welcome to Birmingham History Forum. The only way you could confirm this if the records say not would be a DNA test if the third party agreed.

Do bear in mind that lookalikes do occur in people and some of them have features that are incredibly similar. I once had a friend, who was quite a giant of an individual, so much so I though he was quite unique.

We were out walking in Derbyshire one day when we bumped into what could have been his twin. Even the other person had a surprise.

 

[MWS]

Many strange things happen, so anything is possible.

However, if they were born in a hospital then there would have been a record of them and an unofficial adoption woud seem unlikely. I would expect there to be a birth registration for both, also if you know the name of the other man then it is possible to check for a registration for him.

 

[I Am Nico]

Many strange things happen, so anything is possible.

However, if they were born in a hospital then there would have been a record of them and an unofficial adoption woud seem unlikely. I would expect there to be a birth registration for both, also if you know the name of the other man then it is possible to check for a registration for him.

In my search for my birth family we discovered that if twins are born the time of their birth is on their birth certificates. Whether that applies if they are born on different days I don't know. I discovered one of my siblings grandfathers who had raised them, was a twin, they had not known that. And in my Adoptive family one of my great uncles was also. Again unknown to the family. In both cases one of the twins sadly did not survive. On the other hand, one of my siblings was the spitting image of my friend as teenagers. I showed my sibling a photo which they thought was of themselves.