A lawyer (also known as a barrister, attorney, counselor or solicitor) was an individual who practiced law.
John Hopkinson was the solicitor for Inspector Ian Stratford during the divorce of his wife. He was called to visit Banquo Manor after the Eighth Doctor, Fitz Kreiner and Compassion were stranded there. (PROSE: The Banquo Legacy)
The lawyers at Hokrala Corp attempted to sue Torchwood for mishandling the 21st century and improper maintenance of the Cardiff Rift. Every year after 2000 they would send a writ to shut Torchwood down. (PROSE: The Undertaker's Gift)
Peter Dalton was a lawyer that the Trickster saved from death and used to try manipulating Sarah Jane Smith. The plan failed when Dalton broke the bargain and became permanently dead. (TV: The Wedding of Sarah Jane Smith)