In the 'Home' sequence, the position of the boat they are singing and dancing on consistently changes its position on the River Thames. Battersea, Westminster Bridge and Tower Bridge are all seen in the short number. This would usually indicate that the number was filmed numerous times on that day and the sequence was then spliced together in editing using the best elements from each take.
At the end of the "Home" sequence, Johnny, Jerry and Edward sit on the back of the boat and have to pretend they are falling backwards off the stern. Moments before they are supposed to fall, the hands of two or three members of the crew can be seen raising into shot ready to catch them.
The shadow of the film camera is visible on the Pepsi-Cola crate in front of Richard O'Sullivan standing on the catering wagon when they are filming in the desert.