Founded in 1997 by Mike and Alison Porritt, theNewcastle-based four-outlet discount car supermarket Carshock has since grown sales by over 97% per annum to reach turnover of £6.4 million in 2002, when staff numbered 23. Carshock was the tenth fastest-growing firm in the 2002 Sunday Times Fast Track list of UK companies. It is the only automotive firm in this year's list.