What s this

Can anyone put a name to this shrub please?

I am not expert but it almost looks like white dwarf oleander? Although, I do not think it would survive winters in UK (outside) or would it?
The oleander (Nerium) contains the toxic glycoside oleandrin

Try Choisya Ternata 'Aztec Pearl' :-), flowers in spring with lovely scented flowers I have it too one of my favourite shrubs.
Common name Mexican orange blossom :-)

Yes of course Simbad. I have choisya as well up north. I must be affected by this southern sun. We are in Mexico. Definitely Mexican Orange plant and blossoms.
:-)

Its a lovely shrub isn't it Klahanie I bought mine as a tiny little plant 10 years ago its 4ft x 4ft now and covered in flowers every spring wouldn't be without it :-)), ooo send some sun this way please!!!

Oh yes, it is great plant and deer will ignore it, which is a big plus in my garden. We have lots of deer on Vancouver Island. I have it probably for 5 years and it is little smaller than yours Simbad.

Many thanks.
With your help I have been able to look up Choisya Ternata "Aztec Pearl" and it certainly looks similar.
The one is the photo is growing in my garden in the South of England.
Isn't this wonderful to be able to ask a question and receive replies from afar.