 His 300th appearance for Darlington on 1 May 2004 was marked by a commemorative beer brewed by the Darwen Brewery – Liddle's Best, as well as specially printed T-shirts going on sale.On the announcement on his retirement in May 2005 Liddle was granted a testimonial against his former club Middlesbrough in July 2005.Due to a hoax bomb threat the game had to be abandoned at half time.