okay, so according to wiki there have been more than 2...
1969 – Two Gnats crashed, one striking trees at Kemble during practice with one fatality and the second crashing short of the RAF Fairford runway.[citation needed]
20 January 1971 – Two Gnats collided during the cross-over manoeuvre with four fatalities.[18]
17 May 1980 – A Hawk hit a yacht mast at an air show in Sussex, the pilot ejected safely.[18]
1986 – A Hawk rammed into the back of another on a runway.
1987 – A Hawk crashed into a house in the neighbouring village of Welton, Lincolnshire while practising, nobody was killed and both pilots ejected safely.[19]
24 June 1988 –A Hawk crashed whilst attempting to take off, and the fuel tanks exploded. The pilot ejected safely.[20]
1988 – Flt Lt Neil MacLachlan died practising a "roll back" during practice at RAF Scampton. [21]
17 October 1998 – Flt Lt R. Edwards landed short on the runway after a practise run at the Red Arrows then home base, RAF Cranwell, and safely ejected at low altitude.[22]
9 September 2003 – A Hawk overshot the runway during landing at Jersey Airport while arriving in advance of the Jersey International Air Display. The pilot, Flt Lt Jez Griggs, ran the jet into a gravel pile and little damage was caused. Nobody was harmed. Displays were not affected because the Red Arrows take a spare aircraft with them.[23]
2007 – The wingtip of a Hawk hit the tail of another during practice flight near RAF Scampton.[24]
23 March 2010 – Two Hawks were involved in a mid air collision. The synchro pair were practising one of their manoeuvres when the two aircraft collided. Red 7, Flt Lt David Montenegro managed to land his plane safely, but the other (Red 6, Flt Lt Mike Ling) was forced to eject and was taken to hospital with a dislocated shoulder. The incident took place during pre-season training at Hellenic Air Force base, Kasteli, in Crete.[25]
20 August 2011 – A Hawk crashed near Bournemouth Airport following a display at the Bournemouth Air Festival. Flight Lieutenant Jon Egging, pilot of Red 4, was killed in the accident.[26] After the show, as they were returning to Bournemouth Airport to land, he lost height after the split of the formation.