When Hoskins is paying for his breakfast in Sid's café, the length of Sid's cigarette changes inconsistently between shots.
When Rodders opens the back of the lorry looking for Del in the background on the docks there are some cars parked, the next shot shows Delboy getting up from the blankets and staggering towards Rodders, the next shot shows Rodney looking into the trailer and the parked cars behind him are gone and finally as we see Del exit the lorry trailer the cars are back again.
When Rodney spots the ferry whilst at sea he exclaims "It's The Norland". Whilst The Norland was indeed a North Sea Ferry of that period, the actual vessel shown is either The Norwave or The Norwind, a much smaller ferry, and one of the predecessors of The Norland.
At the end where Del throws the fifteen thousand claiming it was false, if he had really thought it was false, Del would never have given the diamonds to Boyce, he would have refused the money saying it was fake.
Rodney says that they followed the ferry on their return to Hull, but its unlikely that the boat that Del chartered, capable of only a few knots, would be able to keep up with it.
The Trotter's should have been arrested for Diamond smuggling by Hoskins.
(2:46) The tops of the wall flats used for the Nags Head set can be seen to the top-left of frame - particularly on the Blu-Ray release.
The Trotters' three-wheeled van should be clearly visible to Slater, Hoskins and Parker at the transport cafe. The back of Denzil's lorry faces the van.
It makes no sense why Boycie and Abdul (and Del) would go ahead with the crime when they know Slater is onto them and knows exactly who is involved (apart from the courier).
At the railway station, Rodney reacts with disbelief and amazement when Albert gets off the train, as if he didn't know or even, that Del hadn't told him, that Albert was going to pilot the boat to Amsterdam.
As the Trotters return to the flat after coming back from Holland, Rodney shows Del and Albert £15,000 and says he picked it up when they were running around the table from Slater. But when the Trotters were seen running around the table at The Nag's Head earlier, Rodney clearly didn't pick the money up. Then, when the Trotters exited the room after Del told Boycie and Abdul that he's going home, Rodney did not pick up the money from the table, he just walked out of the room without going near it.
Before Del throws the £15,000 out of the balcony, Rodney tells him they should invest it. But in "Time on Our Hands (1996)", Rodney is completely against the idea of investing when Del suggests what to do with their new fortune.