Could botox treat migraines?

NHS support page for those who suffer from migraines(www.nhs.uk)
The Migraine Trust, and its advice on botox as a treatment(www.migrainetrust.org)
Dr Mark Weatherall(www.imperial.nhs.uk)
A recent review of all the data showing the effectiveness of Botox for migraines(jama.jamanetwork.com)