In a couple of days I'll be flying with LOT airline with a transfer in Warsaw Chopin Airport. I have about 12 hours between my flights (as scheduled) - I am arriving at around 10 am and my next flight departs around 10:30 pm.
Having essentially a whole day, I'm planning to go into the city. My luggage will be checked through (I verified with the airline), so I'll only have my small backpack with me - so much easier to deal with. I don't need a visa as I'm a UK citizen. From previous experience, LOT doesn't give me the boarding pass for the second flight, so I'll need to get that in Warsaw - before going to the city, naturally.
Other than the usual "make sure to be back on time", is there anything specific I need to be aware of with my plan?
Please note that this question is not about what to do in Warsaw for a day (I already have an itinerary in mind) and not about how to get to the city and back (I did my research on that front, too).