See www.thegrocer.co.uk/sourcing/british-food-trapped-in-europe-as-port-chaos-spreads/651282.article
Short version; severe delays in Felixstowe have forced some ships to divert to mainland Europe ports such as Rotterdam. Problem is the shipping lines are refusing to release them to the supermarkets to drive round to the UK instead insisting they must wait for a feeder vessel to ship back to Felixstowe.
I would expect spices (Asia) and in particular Cranberry (US) to be affected, also sweet potatoes (US).