The institute is located in the Ogden Centre for Fundamental Physics, adjacent to the main Physics department building (Rochester building).
By train:
If you are arriving in Durham by train, the train station is a 20 minute walk to the Science Site. Otherwise you can take a taxi (there are taxis outside platform 2 or you can get an Uber).
By plane:
The closest airport to Durham is Newcastle (NCL). From there you can either take a taxi to Durham or the metro to Newcastle rail station and from there a local train to Durham.
