Hansard Answer
Below is the text from a House of Lords question regarding RAF/RN assets involed in detecting and intercepting Russian aircraft:
"Lord Trefgarne asked Her Majesty's Government:
What Royal Air Force and Royal Navy assets are available to detect and intercept Russian Bear aircraft which may approach United Kingdom airspace. [HL5273]
The Minister of State, Ministry of Defence & Department for Business, Enterprise and Regulatory Reform (Lord Drayson):
The Royal Air Force is responsible for the detection and identification of aircraft and the dissemination of the recognised air picture within United Kingdom airspace and its approaches, using assets such as RAF control and reporting centres at RAF Boulmer and RAF Scampton and remote air defence radars and communications sites. RAF Sentry aircraft, Royal Navy Type 42 air defence assets and Sea King air surveillance and control Mark 7 helicopters all have the ability to contribute to the recognised air picture when operating around United Kingdom airspace and waters.
Royal Air Force Tornado F3 and Typhoon aircraft maintain continuous quick reaction alert readiness and are normally based at RAF Coningsby and RAF Leuchars."