What you are describing is textbook romance scammer.
In fact, if you look at the overview here, you will see that architect is at the top of the list of scammers' fictional careers. viewtopic.php?f=13&t=3607
Most often they claim to be single fathers, but occasionally they will claim to have no children.
Parents deceased when young, no real close family
He's setting up now for why he will have nobody else to turn to when an emergency arises and he needs money.
He claims to be in Scotland working on a project and claims to live in Greenwich
Another typical scammer claim. They are using stolen photos, and in reality don't look anything like the person they are impersonating, so they have to be far enough away that they can't come meet you. Later, the "stranded in a strange country" approach will be used when the money requests come.
it sounds like it is coming from a book.
That's because it is all copied, probably from the internet. Often (though not always) you can search and find the source.
confronted him gently about why he was removed from jdate and he told me he had a 3 month membership and cancelled it.
Scammers lie, again and again. It is what they do for money. They spend some time building the illusion of a romantic relationship, through a series of lies, until they are confident that you love and trust them. They they will take advantage of that love and trust to get money out of you.
Dating sites like jdate will not close accounts for scamming unless they have real evidence of scamming.
These scammers will typically scam several women at once), and he had started asking for money. He was probably reported to jdate after he asked for money.
You can help other potential victims by posting some of the emails he sent you, as these are scripts that he will use again and again.