Packing: Bring warm layers, a waterproof coat, and adaptable footwear for London’s winter. Documentation: Carry printed and digital copies of passports, visas and connection confirmations, and verify transit visa requirements for hubs (CAI, IST, DOH) well before departure. Weather & delays: Expect reduced daylight and possible snow or fog delays at Heathrow in December; factor in extra connection time and purchase travel protection where appropriate. Security & safety: Given the operational complexities for departures from Yemen, stay informed with your airline and government travel advisories in the weeks leading up to your flight.