Part of the plot involves Del Boy's video recorders failing because they're designed for use in continental Europe and thus not compatible with the UK electrical system. In reality, there is no significant difference between the UK and continental electrical systems other than the two using different outlets. A VCR designed for continental Europe would be unusable in the UK, but because of differences in TV standards rather than any electrical issues.
Denzil arrives at the flats just a few seconds after Del drives away in the van and would have seen him leaving.
Rodney refers to a character named Ronnie Nelson as "Willie Nelson."