Spekesoftly
Arrow operated from Denver to Gatwick on behalf of Western Airlines circa 1982 when Western pulled out of the route around Christmas time.
I went out with Western on the DC10 to Denver but came back from Denver to Gatwick on an all white 707 of Arrow with no markings. Most booked passengers travelled back with TWA or alternatives via Chicago.
Funnily enough the flight was enjoyable and food excellent. Mind you there were only about 50 aboard.
I believe the authorities stopped the Arrow / Western flights a day or so later due to some licencing issue.