"Only hand luggage is included"

I'm travelling with British Airways from Zurich to London City Airport, and my ticket says "Only hand luggage is included in the ticket". Now, according to the British Airways website hand baggage includes a cabin bag and a personal bag; I'm however somewhat confused by the wording - does this mean I can bring a backpack and a small bag?

I'm also concerned about this:

If you are travelling on a UK Domestic or European shorthaul flight, to and from London, you can travel light and make a quick getaway with our hand baggage only fares. These don't include a checked baggage allowance but everything else is covered by the great-value price, including free online check-in, allocated seats, the same generous hand baggage allowance, and refreshments on board

Sorry if this is an obvious question, it's my first time traveling.

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What does it mean by hand luggage only?

The term hand luggage or cabin baggage (normally called carry-on in North America) refers to the type of luggage that passengers are allowed to carry along in the passenger compartment of a vehicle instead of a separate cargo compartment.

What is hand luggage size?

One personal bag, such as a handbag, laptop bag or small backpack, which must be able to fit under the seat in front of you. One bag, which must be able to fit under the seat in front of you. 45 x 36 x 20cm, including any wheels and handles.

Are airlines strict with hand luggage?

Absolutely. This is a key element to ensure you don't encounter any issues with your hand luggage weight. Otherwise, you'll be forced to approach the airlines desk where it is more likely they will ask you to weigh it. Besides, you should always check in online when you intend on taking hand luggage only.

Is hand luggage a personal item?

Domestic carry-on policies. A good rule of thumb is that if your carry-on bag fits under the seat in front of you, it's considered a personal item. This includes small backpacks, purses, briefcases, laptop bags, etc. Larger bags, including suitcases, must fit in the overhead bin compartment.

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