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TI-26-010 - LAC West - Splitting Procedures

Instruction ID TI-26-010
Valid 10/08/2026
Applicable To LAC West & top-down airfields
Mandatory Mandatory

Introduction

For the Buzz Before Bristol event, a temporary arrangement is made to allow for the splitting of LAC West.

If required due to controller workload, split positions in the West LAG (defined in this post) may be opened without the rest of West being staffed.

Split Sectors

Tip

Right click and 'Open image in new tab' to view larger versions of the sector diagrams.

Brecon

  • Logon Callsign: LON_WB_CTR (1)
  • Frequency: 135.255
  • RTF callsign: London Control
  • Coordination callsign: Brecon
  • Top-down responsibility for: Sector 23
  1. (Relief: LON_WB__CTR)

Brecon is responsible for airspace from the northern boundary with AC Lakes, down to (and including) the core east-west routes, but excluding the airspace in the lower eastern region, as shown in Figure 1.

Figure 1 - LAC West - Brecon - Area of Responsibility
Figure 1 - LAC West - Brecon - Area of Responsibility

Berry Head

  • Logon Callsign: LON_WH_CTR (1)
  • Frequency: 128.815
  • RTF callsign: London Control
  • Coordination callsign: Berry Head
  • Top-down responsibility for: Channel Islands (JJ/JB/JA), Exeter (TE), Newquay (HQ), Land's End (HC), Scilly Isles (HE), Yeovil/Westland (HG)
  1. (Relief: LON_WH__CTR)

Berry Head is responsible for the airspace from the southern boundary with Brest to just south of Bristol/Cardiff. The airspace is depicted in Figure 2.

Figure 2 - LAC West - Berry Head - Area of Responsibility
Figure 2 - LAC West - Berry Head - Area of Responsibility

Sector 23

  • Logon Callsign: LON_23_CTR (1)
  • Frequency: 134.755
  • RTF callsign: London Control
  • Coordination callsign: Sector 23
  • Top-down responsibility for: Gloucester (BJ), Cardiff (FF) (and St Athan (EGSY)), Bristol (GD)
  1. (Relief: LON_23__CTR)

Berry Head is responsible for the lower airspace from the boundary with Worthing and TC South to just west of Bristol/Cardiff. The airspace is depicted in Figure 3.

Figure 3 - LAC West - Sector 23 - Area of Responsibility
Figure 3 - LAC West - Sector 23 - Area of Responsibility

Agreed Levels

The standard "LAC West (North Sheet)" and "LAC West (South Sheet)" agreed level diagrams (published here) can be used for Brecon, Berry Head, and Sector 23 respectively. The following agreements exist for Sector 23:

Sector From Sector To ADES Agreement
Berry Head Sector 23 Brize Group, EGBB, EGBE FL240 lvl EPACE
Brecon Sector 23 Brize Group, EGBB, EGBE FL250 lvl ICOSA
Brecon Sector 23 London TMA Group, Solent Group, EGUL, EGUN Descending FL270
Sector 23 Brecon London TMA Group, Solent Group Climbing FL250

Coordination with Adjacent Units, Sectors and Airfields

Brecon, Berry Head, and Sector 23 controllers must inform all adjacent controllers when non-standard splits are opened/closed.

Neighbouring ACCs are aware of these procedures. However, adjacent UK controllers (enroute, approach and aerodrome) may need guidance on top-down coverage.

Errors in this instruction should be reported to operations@vatsim.uk or in Discord.