Bloom & Wild letterbox / hand-tied flowers

When the calendar has got away from you, this is the dependable move. Order before 10pm and Bloom & Wild offers free next-day UK delivery via Royal Mail Tracked, and the letterbox format fits through the door so nobody needs to be home to sign for it. The stems arrive in bud and bloom over roughly 48 hours, and each box includes a sachet of flower food, styling tips and a free greetings card for your anniversary message. The range flexes from budget letterbox posies at an indicative from-price of around £19 up to larger hand-tied and luxury bouquets, all next-day, so it suits almost any spend. The trade-off is longevity: flowers are consumable, so this carries less weight alone at a significant milestone and works best alongside one of the picks above. Note too that next-day is not guaranteed - Royal Mail Tracked reportedly reaches the chosen day around 94% of the time - and it's not the gift for someone with a pollen allergy.