The workshop venue is lecture theatre 2, Blackett Laboratory building, ICL South Kensigton Campus.
ICL - South Kensington Campus Map and Information -
https://www.imperial.ac.uk/media/imperial-college/visit/public/SouthKensingtonCampus.pdf
Travel -
https://www.imperial.ac.uk/visit/campuses/south-kensington/
Campus Catering and Local Food
https://www.imperial.ac.uk/food-and-drink/catering-outlets/
Accommodation - Please see list of hotels attached to main page for accommodation that Imperial has a negotiated rate with, mention that you are booking for an Imperial event when you contact these. There are also many hotels a short public transport ride away that may be cheaper than those in South Kensington