no where to expand really youve only got on exit from the ground you got a tube line one side houses etc etc i remember when i worked there they said its a saftey risk to expand on the site as theres only one exit and getting 42,000+ out is hard enough as it is also this http://www.mirrorfootball.co.uk/news/Chelsea-take-first-step-towards-leaving-Stamford-Bridge-for-a-new-ground-article807880.html