I'd say you've fermented fully if those gravity readings are accurate. prime it, and I would indeed re-pitch yeast, as the current yeast has probably hit its limit, and died off in the last 6 months.
even if it hasn't, its likely too dormant at this stage, with too much alcohol in solution, to restart itself to carbonate.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
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