What is the British Airways carry-on allowance?

British Airways allows one cabin bag of up to 56 × 45 × 25 cm with no weight limit in most fare classes. This is one of Europe's most generous carry-on policies and applies to hand baggage on all BA-operated routes. You may also bring one additional personal item such as a laptop bag or handbag.

How does easyJet's large cabin bag add-on work?

EasyJet's standard free allowance is a small underseat bag (45 × 36 × 20 cm). To bring a larger overhead carry-on, you must purchase a large cabin bag add-on at booking. This allows a bag up to 56 × 45 × 25 cm. Without this add-on, your larger bag will be checked at the gate and a fee charged.

How much time should I allow at Heathrow Terminal 5?

Terminal 5 handles all British Airways departures and is generally the most efficient terminal at Heathrow. Allow a minimum of 2 hours before departure. Security at T5 moves faster than other Heathrow terminals, but the airport is very large and walking time to remote gates can add 20 minutes.

What is the transfer time between Gatwick's North and South terminals?

The Gatwick inter-terminal shuttle train runs every few minutes and the transfer takes around 10 minutes including walking time at each end. If your outbound and return flights use different terminals, allow at least 30 minutes for a relaxed transfer with carry-on luggage.

Do I need a rain jacket for the UK?

Yes, a compact rain jacket is non-negotiable for any UK trip regardless of season. UK weather is famously unpredictable — a sunny morning in London or Edinburgh can turn to sustained rain by early afternoon. Choose a packable jacket that compresses to a small bag, so it takes up minimal space in your carry-on but is always accessible.

Carry-On Only for the UK: Airlines, Airports, and Packing Smart

The UK is one of the easier destinations for carry-on only travel if you fly with the right airline. British Airways' unlimited weight policy removes the most stressful variable from the equation. The catch is the UK's weather, which demands a rain jacket regardless of what the forecast says on the day you pack, and city walking distances that require genuinely comfortable footwear.

British Airways: Europe's Most Generous Carry-On Policy

British Airways operates with no carry-on weight limit in most fare classes — only size matters. The maximum dimensions are 56 × 45 × 25 cm including wheels and handles, and you can also bring a personal item (laptop bag, handbag, or small rucksack) with no additional restrictions.

In practice this means you can pack a dense 10–12 kg carry-on bag on British Airways without any weight anxiety. This is especially useful for UK trips in autumn and winter when clothing is heavier. If you are visiting the UK and have any flexibility in airline choice, prioritise British Airways for the outbound leg at minimum.

easyJet: Buy the Add-On Early

EasyJet operates a tiered bag system. The free allocation is a small underseat bag — 45 × 36 × 20 cm — which is not large enough to be a useful carry-on for a multi-day trip. To bring a full-size overhead cabin bag (56 × 45 × 25 cm), you must purchase the large cabin bag add-on when booking. This is significantly cheaper if bought at the time of booking than if added later, and dramatically cheaper than paying at the airport gate.

Buy the add-on when you purchase your ticket. Do not assume your bag will be accepted at the gate without it.

Ryanair: Priority Boarding Is the Key

Ryanair's standard carry-on rules apply in the UK as everywhere else. Free passengers may bring one small personal item (40 × 20 × 25 cm) under the seat. To bring a full-size cabin bag (55 × 40 × 20 cm) into the overhead bin, you need priority boarding or a Plus/Flexi ticket. Without priority, your cabin bag will likely be gate-checked into the hold — for free on the outbound leg, but it creates uncertainty about arrival timing.

Buy priority boarding when booking Ryanair flights to or within the UK. It is the single most effective way to reduce friction on budget UK routes.

Heathrow Airport (LHR): Allow Extra Time

Heathrow is one of the world's busiest airports and requires more time than its efficient moments suggest. The terminal map matters:

Terminal 5 handles all British Airways departures and is the most efficient terminal. Allow 2.5 hours before departure for international and 2 hours for European routes.
Terminal 2 is the United hub and handles most Star Alliance carriers. It can have longer security queues during peak periods.
Terminal 3 handles Virgin Atlantic, Delta, and various oneworld partners.
Terminal 4 is a separate building accessed by the Heathrow Express connection — if you are departing from T4, allow an additional 15 minutes.

The Elizabeth line connects central London to Heathrow in around 35 minutes from Paddington. The Heathrow Express is faster (15 minutes) but costs more. The Underground Piccadilly line is cheapest but takes around 50 minutes with stops.

Gatwick Airport (LGW): North vs South

Gatwick has two terminals — North and South — that feel like separate airports connected by a short automated train. EasyJet uses the North Terminal. British Airways and most other carriers use the South Terminal. The journey between them takes around 10 minutes including the train ride and walking. If you need to switch terminals, allow 30 minutes.

Manchester Airport (MAN): Terminal Check Required

Manchester is the UK's third-busiest airport and serves a wide range of destinations. EasyJet operates from Terminal 2. Ryanair operates from Terminal 3. British Airways uses Terminal 1. Always confirm your terminal at check-in — bus and rail services to the airport approach the central transport interchange, and each terminal requires different directions from there.

What to Pack for the UK

Rain jacket: Non-negotiable. The UK receives rain in every month of the year. Choose a compact packable jacket — one that stuffs into its own pocket — rather than a heavy waterproof coat. This saves significant space and weight while giving you full weather protection.

Layers: UK indoor heating varies wildly. Museums and older buildings can be chilly. Restaurants are usually warm. A lightweight merino mid-layer that packs small handles this variability better than a single heavy option.

Walking shoes: London, Edinburgh, Bath, and most UK tourist destinations involve 20,000 to 30,000 steps per day. This is not an exaggeration. Pack footwear that is genuinely comfortable for all-day walking — broken-in trainers or walking shoes, not fashion sneakers you have not tested properly. Blisters from poorly chosen shoes are the most common trip-disrupting issue for UK visitors.

UK Rail Travel With Carry-On

UK trains are carry-on friendly. Overhead racks exist in most carriages and luggage areas are provided near the doors for larger bags. There is no overhead size restriction. Booking in advance on the National Rail network delivers significant price savings — flexible tickets on popular routes like London to Edinburgh or Manchester to London can be expensive if purchased on the day.

The Railcard system offers 33% discounts on most fares for eligible travellers (under-30, over-60, or 16–17 year old). A digital Railcard on your phone is accepted at barriers on most networks.