[Police] my first trip to the UK in Sept 2004

Longtime lurker here! If any members from the London area would like to respond, please e-mail me privately. Just wondering about places to see & transportation -- in particular, is it a simple thing to travel the Underground from Heathrow to the Russell Square station and back? The trip planner option on the London transportation site only confused me more (where the heck is Bushey Station?). Looking for any helpful advice. Thanks! Anne