Guide to Visual Flight Rules (VFR) in the UK(27)

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(c)  Accept airborne flight plans and pass the information to the appropriate authority.
 
The service from London Information will be provided by one controller only; pilots are therefore asked to keep their use of it to a minimum. Due to the possibility of simultaneous aircraft transmissions, the response to RTF calls may be affected. Requests for joining or crossing airways within the London FIR should continue to be made on the London FIS frequencies rather than direct on the Controlled Airspace sector frequencies.
 
 
Lower Airspace Radar Service (LARS)
 
(a) The service is available to all aircraft flying outside Controlled Airspace up to and including FL 100, within the limits of radar/radio cover. The service will be provided within approximately 30nm of each participating ATS Unit. Unless a participating ATS Unit is H24, the service will normally be available between 0800 & 1700 (Winter) and 0700 & 1600 (Summer), Mondays to Fridays. However, as some participating Units may remain open to serve evening, night or weekend flying, pilots are recommended to call for the service irrespective of the published hours of ATS. If no reply is received after three consecutive calls, it should be assumed that the service is not available.

 
(b) LARS will not normally be available from non-H24 ATSUs at weekends and Public Holidays;

 
 
(c) Pilots intending to operate above FL 100 may be advised to contact an appropriate ATCRU.

 
 
(d) The service provided will be a Deconfliction Service or a Traffic Service (see previous pages).

 
(e) Bristol Filton and Bristol LARS:

 
Due to the impracticalities caused by the position of Bristol Controlled Airspace with regard to the LARS area served by Bristol Filton, it has been agreed that during the hours of service published for Bristol Filton LARS the following procedures will apply:
 
. Aircraft requiring a LARS north of a line between the M5 Bridge over the River Avon and the M4 junction 18, i.e. north of a line 512920N 0024135W and 513005N 0022119W, will receive the service from Bristol Filton.

 

 
. Aircraft requiring a LARS south of a line between the M5 Bridge over the River Avon and the M4 junction 18 will receive the service from Bristol.

 

 
. Aircraft calling either one of these Units in the other's agreed area of responsibility will be instructed to contact the appropriate unit.

 

 
(g)  The provision of LARS is at the discretion of the controllers concerned because they may be fully engaged in their primary tasks. Occasionally, therefore, the service may not be available.
 
Reference to specific LARS can be found in the ENR 1.6 section of the AIP. The LARS coverage diagram is located at ENR 6.1.
　
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