A group of 34 people are travelling to Split from UK in Sept .
Please advise best way to travel between Split and Biograd, train, bus or ferry?
Where can we find details such as timetables and prices?
There is no train or ferry between Split and Biograd. The only transport is by road, by bus.
Buses go from Split to Biograd regularly, almost every hour, sometimes more often, but you might have problem finding places on one bus for 34 people. Perhaps you can get private transfer for your group if you all want to be on the same bus?
Bus station in Split is
http://www.ak-split.hr/EN/vozni.red/VozniRedOdlazaka.aspx
where you can find bus timetables.
September is not listed yet, but bus timetable will be similar as now.