I was very fortunate to be on their 70th and 75th D-Day celebration tours. The service and attention to details was exceptional. It was very moving to go back.
A twin room has two separate beds, and a double room has one bed for two people to share.
No, only breakfast is included. Your guide will suggest locations for lunch and there are restaurants within walking distance of the hotel for dinner.
The exact meeting location will be confirmed closer to the tour start date, but it will be in central London.