Bindweeds

The large white trumpets of Hedge Bindweed are beautiful but unwelcome in the garden because the roots are so difficult to eliminate.  There's a fantastic display on the Thornbury compost site at the moment.

The smaller flowers  of the field bindweed are often tinged pink and it tends to sprawl through the grass rather than climbing over hedges - and compost heaps!

Both flowers have spearhead-shaped leaves but the field bindweed leaves are smaller and more pointed.