The conference is hosted by the University Portsmouth's Faculty of Business and Law. The local organizer, Wolfgang Luhan, is part of the active Behavioural and Experimental research group. The main campus is located close to the city centre, the harbour and the historical old town. There are a number of hotels, two train stations and many entertainment options within walking distance.
By plane
The closest airports are Gatwick and Southampton, both with good train connections to Portsmouth (ca. 80 and 90 minutes respectively). The next larger Airport is Heathrow, the trip to Portsmouth via public transport will take about 2 hours and 20 minutes.
Some popular search engines to help you look for flights
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https://www.google.com/travel/flights
https://www.kayak.co.uk/flights
By train
Portsmouth (Stations 'Portsmouth and Southsea' or 'Portsmouth Harbour') can be easily reached from London via direct trains every 30 to 60 minutes from 'Waterloo' or 'Victoria' stations. The journey takes between 1.5 and 2 hours. https://www.nationalrail.co.uk/
The conference will take place at the Faculty of Business and Law's Portland Building. The Faculty Buildings are all within walking distance from both train stations (5-10 minutes), the harbour the main central Bus terminal.
Busses are the main mode of public transport, but there are several bike and e-scooter loan schemes in Portsmouth.
You can find more travel infos and campus maps on the University's webpage.
The University has made arrangements with several hotels close to the conference venue (you should still double check prices on one of the big hotel booking websites). Please contact Wolfgang Luhan to enquire about the special conference rates.