As commanding officer of XIII Squadron, Dalton deployed on Operation Jural, the United Kingdom's contribution to Operation Southern Watch enforcing the No-Fly Zone over Southern Iraq. He then moved on to high command, serving as Head of Air Operations at the Ministry of Defence during the preparations for and conduct of Operation Telic in Iraq. Most recently he was appointed Chief of the Air Staff, the professional head of the Royal Air Force, in which role he advised the British Government on the deployment of air power during the Libyan conflict. In that capacity he implemented 2,700 redundancies, as determined by the Strategic Defence and Security Review.
Dalton was promoted to group captain on 1 July 1994,[11] and in 1997 took command of RAF Coltishall and the RAF's Jaguar force.[3] On promotion to air commodore on 1 January 2000,[12] he was appointed Head of the Eurofighter Typhoon Programme Assurance Group at the Ministry of Defence.[3] Following the Higher Command and Staff Course in 2002, Dalton was appointed Head of Air Operations, also at the Ministry of Defence.[3] His tenure in this role was dominated by the preparations for and conduct of Operation Telic in Iraq.[3]
In light of the Libyan conflict, Dalton warned that there "was a heck of a lot to be doing" and that the military was nearing the point of "exhaustion". On 24 June 2011 The Daily Telegraph confirmed that Dalton, in common with the First Sea Lord and the Chief of the General Staff, would lose his position on the Defence Board, the highest non-ministerial Ministry of Defence committee, which makes decisions on all aspect of military policy.[21] He retired in July 2013.[22]
Dalton was appointed as Honorary Air Commodore to the RAF Regiment on 21 September 2013, in succession to Air Chief Marshal Sir Richard Johns.[23] He became Vice President of the Yorkshire Air Museum in 2009 before taking up the post of President in 2015.[24]
Dalton is married to Anne:[31] the couple has two grown-up children.[3]
Dalton's interests include sports, theatre and history.[3] He was awarded an honorary degree by the University of Leicester in 2011[2] and an honorary Doctorate of Science by the University of Bath in 2013.[32]