I am a Slovak EU citizen. A bunch of my friends and I are planning to go on a trip to the UK for 2 months when we are 15. Our parents are fine with it, but are concerned about whether or not this is legal.
How does EU-wide travelling work for persons who aren't yet 18? We'll all have passports and Slovak/EU IDs. Do we absolutely need to travel with an adult who will be legally responsible for us, or is it enough to have some sort of evidence/legal agreement that our parents let us?