Ramadan traditions, rules, and cultural etiquette could be different country by country. It is important to familiarise yourself with local expectations when you are abroad on university activities. Muslims always say or write 'Peace be upon him' after the Prophet Muhammad's name, you can shorten it to (pbuh). Muslim countries, including Dubai, normally have designated screened-off areas for non-Muslims to eat and drink during the daytime. There would also be expectations concerning dressing etiquette and other social activities.
In the UK, you should carry on business as usual as a non-Muslim. You do not have to fast even if your best friends are observing. You can eat in front of Muslim students or staff, although, it might be polite to ask first. It is also a courtesy to try not to schedule working lunches during Ramadan. They can go for a coffee chat with you, but they would take a pass on eating or drinking. You can also join your Muslim peers and friends for Iftar, which a big communal meal as the breaking of the fast after sundown. Previous UOBISOC’s Community Iftar in the Green Heart was attended by over 400 students, staff, and community members. For greetings, you may say ‘Ramadan Mubarak' or 'Ramadan Karim' (meaning Happy Ramadan). Your Muslim friends will appreciate the thoughtfulness.