When Eddie speaks to Rick Parfitt and Francis Rossi of Status Quo, he gets their names the wrong way round. Although mistakes and supposed ad-libs are often clearly preplanned for the programme, the reaction of the band members seems to suggest that this was a genuine mistake.
When "Prince Charles" and "Diana" call to collect their baby from Syd, they ring the front doorbell, but Syd only has to open the living room door to let them in. However, as a light entertainment comedy show, these elements are not meant to be taken entirely seriously.