KD, he is trying to fake a tilt shift look by blurring the top and bottom. It's a very marmite look but it is quite popular if you read a lot of wedding blogs. It can work in the right photo.
As for the photos, they are very samey in all : - stand stiff, smile. I don't see much direction from you apart from that. It can work for a couple of photos but I see those a lot from you in all your shoots. There is always that space between them in all of them, I see what you are trying to do, I see those photos a lot and they are very in right now and I do like it and use it but you need to mix it up, perhaps with some props from the day that you come across.
They are nice pictures but they don't tell me you took them in London though, I am not familiar with those bridges or that tree, it may be famous for being old, I just never seen its association of it with London itself. If the client just want engagement shoot and they live in London then that's fine, if however you want a set of photos that reflect the fact that it was taken in London and a set that can adds something more to your portfolio (adding the location element) then this falls short as there is nothing here to me that tell me you are in London.
Besides the landmarks that people have mentioned.
There are:
Red buses.
Black cabs.
Famous Street names signs.
Could have gone inside the British Museum and took a photo under that roof, with a wide angle it would be quite cool.
Could do a silhouette on Westminster bridge just as a red double deck bus passes by.
If you go to NYC where would you shoot?
Brooklyn Bridge, Empire state, Wall Street, China Town, Tiffany's, Flatron Building, Statue of Liberty?
You could but think outside the box, on top of those think smaller but in detail, the little things. Think of tall buildings like how they form a corridor, those fire escapes on side of buildings, yellow cabs, steam coming up from the drains, subway entrance points, those steps on the front of houses.
Just picture your client sitting outside a cafe drinking coffee in Soho. Shoot across the street at 1/50 ish just as a yellow cab passes by so you catch the rear end of the cab in a blur. The yellow will tell you that they are in NYC. The focus on them looking at each other sitting outside, perhaps he reaches across the table holding her hand, perhaps she use her finger and smear a blob of whipped cream on his nose, there may be a waitress serving another customer on the next table. (process this photo with the T/S effect that you like so much if you like and narrow it to the centre to cut out the clutter top and bottom.)
The photo will say engagement, it will say love, it will say NYC.