WMG: Only Fools and Horses

The "perfect" girl Trigger talks about in 'To Hull and Back' was a real girl
He knew and was perhaps romantically interested in. Look how oddly specific he is and and how she really isn't extremely attractive like most peoples "perfect" girls.

Freddie The Frog Was Murdered
During the events of A Frogs Legacy we are introduced to the humorous revelation the Freddie the Frog committed suicide in a spectacularly ridiculous way by sitting on his own detonator; killing both himself and his accomplice Kelly the Jelly. This sat perfectly well until Rock and Chips where we saw just how cool, confident and seasoned professional criminal the man was - not a man stupid enough to blow himself up. Either Freddie threatens to take his son (Rodney) or threatens the Trotter family which leads to Joan murdering him OR Reg finally grows a pair and gets some payback for Freddie sleeping with his wife.

Vinny the Chain was Del's half brother.
Sometime after his dad leaves, he heads over to Sicily or meets a Sicilian tourist and impregnates her, only to walk out on her also.