Travelling to Cambridge
If you are coming by train, there are several trains from various stations in London to Cambridge Main Railway Station. Depending on where you are planning on staying, Cambridge North may be closer to your accommodation.
If you are flying, the closest airport is Stansted. From Stansted there is at least one direct train to Cambridge per hour. The train takes about 40 minutes.
The second-best option is Gatwick: there are usually two direct trains per hour to Cambridge (the journey with the direct connection takes about two hours).
There is no direct train connection to Cambridge from Heathrow, but there is a bus connection (National Express: the journey takes between two and two and a half hours). If you are flying to Heathrow, you can also take the tube to London King’s Cross (about 1 hour) and then take a train from London King’s Cross to Cambridge (depending on the train, this may take between 50 and 90 minutes).
Once you are at the Main Railway Station, you can take a taxi or walk to most places in the centre. A taxi from the station to the Faculty costs about 10 £. Alternatively, you can reach the Faculty by bus: you can take Bus U (Universal) from the station to Sidgwick site (stops: Bridge St. or West Road), and there are various buses from the station to the city centre. Bus map: here https://www.thebusway.info/pdfs/maps/cambridge.pdf
If you want to buy tickets online for trains and buses, here are the links:
https://www.nationalexpress.com/en
Finding the Faculty
The Faculty of Classics is in Sidgwick Avenue. There are three entrances to the Faculty, but (unless told otherwise by the organizer(s) of your event) you should enter the building from the main entrance, which is also the entrance to the Museum of Classical Archaeology.
You can find a map here: https://map.cam.ac.uk/Faculty+of+Classics#52.200595,0.110160,18
Catering close to the Faculty
There are two cafés on the Sidgwick Site: the Buttery and the Arc Café. Nearby, Selwyn College serves lunch and dinner. Newnham College café is open during the day and Harvey's Coffee shop is nearby.