Yes, not something you normally have to worry about in London! We have an air conditioner in our room so he is sleeping on the floor in the corner of our room.
Cooper appears very intent on getting some of Tom's beer. (Tom is a new friend that Chris met in a taxi line at the train station during the whole ash cloud debacle.)
We got a new lighter weight stroller for planes and such. Supposedly some kids aren't comfortable enough to sleep in them. Doesn't appear to be a problem for Cooper!