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The controller will pass traffic information on relevant traffic, and update the traffic information if it continues to constitute a definite hazard, or if requested by the pilot. However, high controller workload and RTF loading may reduce the ability of the controller to pass traffic information, and the timeliness of such information. Whether traffic information has been passed or not, a pilot is expected to discharge his collision avoidance responsibility without assistance from the controller. If after receiving traffic information, a pilot requires deconfliction advice, an upgrade to Deconfliction Service shall be requested.
 
Subject to ATS surveillance system coverage, Traffic Service may be provided at any level and the pilot remains responsible for terrain clearance at all times.
 
A pilot may operate under his own navigation or a controller may provide headings and levels for the purpose of positioning, sequencing or as navigational assistance. If a heading or level is unacceptable to the pilot he shall advise the controller immediately. Unless safety is likely to be compromised, a pilot shall not change level, route, manoeuvring area, or deviate from an ATC heading without first advising and obtaining a response from the controller.

 
Deconfliction Service
 
A Deconfliction Service is a surveillance based ATS where, in addition to the provisions of a Basic Service, the controller provides specific surveillance derived traffic information and deconfliction advice.
 
The controller will expect the pilot to accept headings and/or levels that may require flight in IMC. A pilot who is not suitably qualified to fly in IMC shall not request a Deconfliction Service unless compliance permits the flight to be continued in VMC.
 
A controller will provide traffic information, accompanied with a heading and/or level aimed at achieving a planned deconfliction minima. High controller workload or RTF loading may reduce the ability of the controller to pass such deconfliction advice; furthermore, unknown aircraft may make unpredictable or high-energy manoeuvres. Consequently, controllers cannot guarantee to achieve these deconfliction minima; however, they shall apply all reasonable endeavors. The avoidance of traffic is ultimately the pilot’s responsibility.
 
The pilot shall inform the controller if he elects not to act on the controller’s deconfliction advice, and; therefore accepts responsibility for initiating any subsequent collision avoidance against that particular conflicting aircraft.
 
A Deconfliction Service will only be provided to aircraft operating at or above a terrain safe level, unless on departure from an aerodrome when climbing to a terrain safe level, or when following notified instrument approach procedures. If a controller detects a confliction when an aircraft is departing from an aerodrome and climbing to the terrain safe level, or when following notified instrument approach procedures, traffic information without deconfliction advice shall be passed. However, if the pilot requests deconfliction advice, or the controller considers that a definite risk of collision exists, the controller shall immediately offer such advice.
　
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本文鏈接地址：Guide to Visual Flight Rules (VFR) in the UK(25)