Hi lizziec, I am total rubbish at flowers but the last one definitely reminds me of basil, do the leaves have a basil smell? Can't quite see if they are hairy or smooth.
"The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it." Sir Terry Pratchett
The last one could be a phlox ... but it could also be many other things ... when it's got flowers we'll (hopefully) know .... don't think it's a basil tho' but I may be mistaken
Number 4 looks to me very like an "Onethera missouriensis." A small evening primrose. Are there any reddish leaves at the base?. I have been growing these in my garden. The centre of the leaves is just where the flowers are about to form.
I have just pinched off the top few leaves to compare with your picture.
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https://www.google.com/search?q=Spiraea+vanhouttei++'Pink+Ice'&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj36oLHiKTbAhWKBcAKHfSfBiwQ_AUICigB&biw=1920&bih=943
I'm wondering if the third one could be a Solidago (Goldenrod) http://www.bbc.co.uk/gardening/plants/plant_finder/plant_pages/870.shtml?
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I have been growing these in my garden. The centre of the leaves is just where the flowers are about to form.
'You must have some bread with it me duck!'
'You must have some bread with it me duck!'