Sweet chestnuts
Yes, they may be very festive and jolly roasting on an open fire but they come with a travel risk.
The rules on packing sweet chestnuts vary by country.
You can bring up to 2kg into the UK from anywhere in the EU and from most European and Mediterranean countries (including Egypt, Tunisia and Morocco).
However, if you’re flying from any other destination, you won’t be allowed to bring in any at all, in hold or hand luggage.
source: express.co.uk