IDs wanted for UK Plants 2

I would welcome any help with IDs for the following plants.

 

#1 Cupressus macrocarpa 'Aurea'.

 

#2 Cercis canadensis f. alba, possibly

 

#2 looks more like a plum or other related plant in the genus Prunus.

 

That was my thought to.
You can clearly see suckers growing from the bottom.
I don't believe Cercis do that.
Prunus however do sucker.

 

I also concur it's likely Prunus, however as a data
point S.W. US and Mexican forms of C. canadensis
both sucker rather heavily.
http://www.glendaleaz.watersavingplants.com/eplant.php?plantnum=24954&return=l1_aM

 

There's also the point that Cercis are hardly ever grown in Britain, you might see an odd one in major botanical collections, but not normally elsewhere.

 

Ah! This was taken at Kew Gardens.

 

Knowing pics were taken at Kew puts a very different light on it.
In that case it is very probably Cercis sp.

But how do you tell if it is Cercis siliquastrum f albida.
OR Cercis canadensis f alba?

Thanks saltcedar, never noticed suckers before.

 

With it being at Kew, the range of possibilities is vastly greater; with the low resolution of the photo, I don't think it's possible to come to any conclusions as to what it is. Needs some close-up pics!