I realise it may not be possible to ID most of these since I don't have really have photos of the foliage or any details about habitat, plant size etc, but I won't know if I don't ask
#1 Looks a bit like Goat's beard?
#2 I think these flowers were quite small, maybe 1cm diameter, growing reasonably close to the ground. Probably growing on the South Downs by the side of a road or path.
#3 Can't remember much about this. Maybe similar to hogweed. Probably growing by the side of a path on the South Downs.
#4 Probably about 30cm high growing at the edge of the road or a path on the South Downs.

#5 I think these flowers are quite small, probably 2cm diameter. The plant is quite a large bush, grown in some gardens.
#6 Taken in Leicestershire
Thanks
Dave