1 03926 91 - Tosca on BBC2/Channel 4, Fault on BBC Proms 92 promo 

In July 1992 an internationally-supported production of Puccini's TOSCA starring Placido Domingo staged by RAI in Rome was presented in the UK in a rare collaboration between BBC2 and Channel 4.
Here is a unique BBC2/C4 promo slide for the event (transmitted live on BBC2 in three parts at times and places "prescribed by the composer") with an omnibus repeat on C4 the following evening.
Also notable in this junction is a promo for the BBC PROMS 92 suffering a false start.