121, Sir Alexander Fleming Building Here is a Google Maps link to Sir Alexander Fleming Building of Imperial’s South Kensington campus. The entrance of the building looks like the picture below. Once you’re in, ascend the stairs directly in front of you. The seminar rooms are located on the right. There are four rooms, numbered 119, 120, 121 and 122. You will find the banner at the entrance of 121. Welcome to join Imperial Speakers!