CHANGE OF HEATHROW ARRIVAL ATIS FROM BIGGIN VOR TO SEAFORD VOR.
AD 2.18 AIR TRAFFIC SERVICES COMMUNICATION FACILITIES
REPLACE 'FREQ 115.100 MHZ DOC 60 NM/20,000 FT. BROADCAST ON BIGGIN 
VOR.' WITH 'FREQ 117.000 MHZ DOC 70 NM/20,000 FT. BROADCAST ON 
SEAFORD VOR.
(HOURS OF OPERATION REMAIN UNCHANGED) .
REPLACE ATIS FREQ 115.100 MHZ WITH 117.000 MHZ FOR THE FOLLOWING 
CHARTS:
AD 2.EGLL-2-1 TO AD 2.EGLL-2-7
AD 2.EGLL-5-1
AD 2.EGLL-7-1 TO AD 2.EGLL-7-10
AD 2.EGLL-7-18 TO AD 2.EGLL-7-24
AD 2.EGLL-8-1 TO AD 2.EGLL-8-12