Andy Sandham, formerly of Core Design, now teaches game design at NHTV in The Netherlands
Recently my friend Ash Kapriélov had the opportunity to interview Andy Sandham, who was part of the Tomb Raider dev team from TR2 through Chronicles. Check out their Q&A on Ash's Tumblr blog.
Croft House, located next door to the old Core Design building, may or may not have been influential.
UPDATE - 7/29: In a follow-up post, also on Ash's Blog, Andy provided several previously unseen pieces of TR 3-5 concept art, including this gem. Did you know Lara could swim 72 blocks before drowning? ;)
Ash has also interviewed other former Core Design team members. Check out his blog for classic Tomb Raider info.