UK Parliament is located in Westminster in the centre of London and is well served by all forms of public transport, most of which is wheelchair accessible. Most visitors to UK Parliament will come to the Palace of Westminster (postcode SW1A 0AA, entrance marked 8 on the map) or Portcullis House (postcode SW1A 2LW, entrance marked 4 on the map). You can find more information here.
Please see the below articles for your preferred travel method:
Getting there by Rail & Underground
Download map of Westminster and the Houses of Parliament (pdf 537KB)