Complex sentence: Lamont has acted in many British productions since the late'90s, but is probably best known for playing the part of Richie Carter in "Emmerdale" from 1999--2001 and returning briefly to the role for Emmerdale's 35th Anniversary episode in October 2007.
Split into simpler sentences: Lamont has acted in many British productions since the late'90s. Best known for playing the part of Richie Carter in "Emmerdale" from 1999--2001 and returning briefly to the role for Emmerdale's 35th Anniversary episode in October 2007.