Revealing mistake: When Del and Jumbo come into the Nags Head to discuss business, Del asks Mike for an Australian lager for Jumbo. Mike lists other Non-British lagers as a choice. When Jumbo says he'll have one of them, Mike produces a pint in less than 10 seconds, certainly no time to have poured a pint.
Continuity mistake: When Del & Rodney are talking to Andy on the hill just before Del goes hang-gliding, look at the first shot of Andy. Over his shoulder, the Trotter van is in full view. The shot then turns to Del & Rodney and when it goes back to Andy, there is no van.
Plot hole: The Trotter's are taken to the office while the supermarket is still open, the office containing the safe. Tender pickups in supermarkets are done throughout the day but how did the cash from the tills at closing reach the safe? It is unlikely that a supermarket would leave large amounts of cash in tills and counter caches. The Trotters were actually in the office as the store closed, as well as Lennox. The safe is far too small. A safe in a large supermarket would contain large bags of change and would have an inner safe for cash bricks. Also, how is it that no other member of staff noticed the situation in the office - such as maybe a member of staff involved in cashing-up tills needing to gain access to the safe? (I work in a supermarket as a Duty Manager).