To join the Guild of Healthcare Pharmacists follow this link to Unite the Union. As a pharmacist member of Unite, you are a member of the Guild.
http://www.unitetheunion.org/growing-our-union/joinunite/
Remember to add in CMM (Contingent Medical Malpractice) insurance; only an additional £15 per annum (collected monthly).
If you’re already a member of Unite then you can manage your account online.