I did my C&G 2381 through T J Lowe at their Bracknell training facility. Their other site is Rotherham.
2381 is a 2 day course, 2391 is three days.
http://www.tjlowe.co.uk/html/services4.htm & http://www.tjlowe.co.uk/training.pdf for last years brochue. They have a new one, they just haven't...