Around 1 million British nationals visit the UAE every year. Most visits are trouble-free.
There is a general threat from terrorism. See Terrorism.
The UAE is a Muslim country. Laws and customs are very different to those in the UK. You should respect local traditions, customs, laws and religions at all times. There may be serious penalties for doing something that might not be illegal in the UK. See Local Laws and Customs.
Take out comprehensive travel and medical insurance before you travel.