From TARDIS Index File, the free Doctor Who reference.

Larry Nightingale
Also known as:
Race:	Human
Home Planet:	Earth
Home Era:	21st century
Appearances:	DW: Blink
Actor:	Finlay Robertson

Lawrence "Larry" Nightingale was a science-fiction nerd who worked in a video-store with Sally Sparrow.

Biography

He first met Sally Sparrow (a friend of his sister, Kathy Nightingale) when he was walking naked around his sister's flat. He knew of the easter-eggs on 17 DVDs containing the Doctor and Martha.

Sally told him that his sister had gone on a trip when she had in fact been transported to Hull in 1920 by the Weeping Angels. Kathy got married to Ben Wainwright, lived a full life, and died in 1987. Unbeknownst to him, Larry had a niece and nephews older than he was.

Larry and Sally found and trapped the Weeping Angels and returned the TARDIS to the Doctor and Martha. Sally and Larry began running the video-store together. The next year, they met the Doctor and Martha in person. The final scene implied that they would pursue a relationship, with the two holding hands as they entered the store. (DW: Blink)

His first meeting with Sally Sparrow

Skills

He knows shorthand. (DW: Blink)