What Would Make My Guests More Comfortable?

We are paying for our guests (about 70 people varying from ages 13-85 with the medium age around 30) to take a 7 night 8 day trip to London with us for our wedding.
So far we have;
- Managed to secure a private plane (its actually half as much to charter a plane compared to buying uncomfortable, longer commercial flights),
- Get hotel rooms in a comfortable hotel (The Landmark of London).
- Got luxury buses to get them to and from all the places they need to go (airport to the hotel, to the wedding and back, etc)What Would Make My Guests More Comfortable?
- Purchased London Pass Card with Travel (for the buses, underground, and any public transportation. Also this card gives them discounts, or free entrance to tons of things around the city)
- Paid for Breakfast and tea at the hotel every day.
- Have a hold with a company to purchase pay as you go cell phones for the week for everyone
- Planned out bags for the plane to keep everyone occupied and happy, food, magazines, mp3 players, books, etc (6 hour flight)