Musk Mallow (Malva moschata) is a species I see in the chalk countryside from time to time, it likes a well drained soil. I imagine they would have been more common before farming mechanised and herbicides became the norm. An archetypal 'cottage garden plant' from the days when cottagers would have propagated the prettiest plants from the surrounding area for their gardens.

 Bumblebees were busy on the flowers. I noticed they seemed to be ignoring the pollen dusted stamen in favour of nectar robbing i.e. extracting nectar from the base of the flower.