Following live firing trials with Brimstone equipped GR.4's of 41(R) and 31 Squadron at the China Lake range in 2005, 31 Squadron was declared fully operational with the missile to become the lead unit with the weapon. 
Brimstone has been developed utilising both high altitude dive and low-level attack profiles. It is a fire-and-forget missile for use against armoured targets on the ground. Target designation can be made using the Head Up Display (HUD) and through the Thermal Imaging Airborne Laser Designator (TIALD) pod. The missile when fired from as far as six miles (10km) from the target drops to a cruise height and using its own terrain avoidance radar proceeds to the target.

Low Level Flying Action

Left to right: Tornado GR.4 (ZA542 '035') in mid-Wales in June 2010. Tornado GR.4 (ZA393 '008') the second of a pair low through the Lakes in September 2010.

Left to right: Tornado GR.4 (ZA564 '053') in special 'Goldstar' colour scheme at low level in mid-Wales in December 2008.

Tornado GR.4 (ZD709 'FA') in it's old 31 'Goldstar' Squadron markings 
but with 12 Squadron 'FA' tail code again indicating a move from Marham to Lossiemouth.

Left to right: Anonymous 31 Squadron Tornado GR.4 in August 2004 and Tornado GR.4 (ZD709 'FA') in October 2005 both transiting through the Lake District. Tornado GR.4 (ZA550 'DD') in February 2006 low flying in the Lake District.

Left to right: Tornado GR.4 (ZA458 '024' x2) at Lossiemouth in January 2008, GR.4 (ZA553 'DI') with Brimstone anti-tank missiles at Marham in June 2005.

Left to right: Tornado GR.4 (ZA398 '010') landing at Lossiemouth in January 2008.
Tornado GR.4 (ZA591 '058') at Brno air show in September 2006.