Hi, this is my first trip on a Contiki Europe tour. I was curious as what happens after the flight to London? Do you have to find transportation on your own from the airport to the hotel? Or do you meet with your tour group at the airport then they have a bus to take the people to the airport?

You are on your own. take the tube - i assume you need to get to either the royal national or imperial hotel. the piccadilly line from heathrow goes to russell sq - where both hotels are located.