Flu vaccine shortages are causing appointments to be cancelled at the last minute in many parts of the country, The Telegraph can reveal. Pharmacists said delays in the delivery of vaccines, combined with the highest uptake of jabs on record, meant some had been out of stock and that appointments had to be cancelled for for some weeks.In other cases, pharmacies have been able to honour existing bookings but unable to open up new slots until supplies are replenished. However, a Department of Heal