If your dog is an indoor dog, he/she will be better protected from the heat. It is outrageous to keep a pet outdoors in these extremely hot tempts.

There are also limited areas in which to walk your pet. For example, the pets cannot walk along the cornish or any of the grassy areas.

There have been many threads that talk about this topic. Do a search on this topic and decide. Like Mandi said, there may be a bigger issue with the mandatory quarantine when re-entering the UK. :(

Good luck.