BBC had a dedicated N. America xmitter at Antigua in the Caribbean, which usually operated on 5975 in the 49m band, heard every where in N. America after local sunset, Late afternoons BBC leased about an hour of time on the religious SW station in Okeechobee, Fl. on a freq in the 25m band. And for those of us on the West Coast, BBC leased about an hour of time in the early evening on the VOA xmitter at Delano, Ca on 6135 kHz in the 49m band. This signal compaired to most other SW stations seemed strong enough to power a small car in my location, absolutely local, at least 5mV on occasion.
The BBC programming on VOA transmitters weren't hourly leases in the conventional sense, dollars for transmitter hours, but more swaps of transmitter hours, particularly for the hours of transmitter time for VOA on BBC transmitters particularly Wooferton.
I looked again at the J-87 schedule I have and bear in mind, any VOA transmitter schedule was only as good as the moment it was printed out. BBC Spanish at Delano on this schedule was:
DL-7 11820 kHz 0230- 0430 UTC
DL-8 6055 kHz 0230- 0430 UTC
Bethany had a BBC English schedule:
BY-6 9590 kHz 0030-0230 UTC
BY-6 9515 kHz 0230-0330 UTC
Greenville had no BBC on that J-87 schedule.
I don't have any copies of the transmitter schedules for Greenville for the early 1980s, but I thought we had at least two or three of the Site B transmitters running BBC World Service.
One other little tidbit regarding the BBC programming on the VOA stateside transmitters, prior to the satellite program circuits, the VOA receiver site at Greenville would use the RCA dual diversity program receivers for the program feeds for the BBC World Service and BBC Spanish service. I distinctly recall feeding the BBC Spanish on the microwave up to Washington to go to the Delano transmitters, but not the English. I suspect by the 1987 schedule, BBC programming might have been on satellite feeds and Greenville was no longer in the BBC program feed via HF radio. Probably, VOA Washington Master Control had the program downlinks for the BBC.