Thanks for all these replies and points raised, all perfectly valid. Sorry didn't get chance to reply earlier, kept meaning to!
Just to clarify, he doesn't even now my surname, he just knows I'm called Julia. The email account I've used to chat with him all this time isn't set up with my surname included. So all my mails to him show as being from Julia + my middle name (with is something very common).
He doesn't know even the name of my village, just knows the name of the nearest big town.
He's never said anything pushy or tried to press me for personal details in the past, so I'm inclined to feel he's NOT a scammer.
His Facebook and other SM (especially Linked in) all check out fine. Shows a lot of interaction with people like his siblings (in UK) who he regularly mentioned to me by name.
I've clicked onto their profiles on FB and see lots of pics with him included at family gatherings etc. Also picks of them visiting him in the country where he's been based.
Siblings all look exactly like him and each other - so I think it's safe to say they're actually his actual siblings.
He's mentioned that he owns a property in the UK (and that's where he's planning to live). He bought it years ago and rented it out up till few months ago (brother took care of all that on his behalf). Has been talking about some garden projects he's planning to do there, as well as the nearest local amenities etc (I gather from him it's in a rural area). I know it's in Lincolnshire.
It's nowhere near where I live, I'm in a completely different part of the country. Would probably take about 7 or 8 hours drive (that's a guess as I've never driven to Lincolnshire in my life!).