Sadly, it didn't work.
Only one SCART appears on the SOURCES menu. This was set to V.AUX, and so the port could be selected by pressing LIST until V.AUX appeared on the Beo4, and then pressing GO.
The option of SET TOP BOX is not available - perhaps because the STB-C is not fitted.
I tried the other options, such as VCD and NON B&O VTR on the SCART, but all that seemed to do was to stop the Beo4 being able to select it in the manner I described above.
The TV is a 28" Avant 81/03.
Firmware is AP:4.0, FEP:2.10.
Any further suggestions would be welcome.
Mark