The team wander round the chocolate factory in their street clothes, while all the staff are wearing protective coats and caps. The team put on the protective clothing for the next shots but they should have done that before they entered the shop floor.
At 8 minutes, Dan and Lisa pull up in a blue BMW YA72EFG which its true number plate., They park next to a BMW police car YH72DKJ which is also a valid number plate but, in the same shot, there is a police van with the number plate AE82MQQ. This number plate will not exist until September 2034 if at all.
From the office outside, Professor T says that the pathology lab is vacuum-sealed and sterile, but the the head of the lab passes through the single door between the two a few times. There is no rush of air and no isolating room or airlock between them so it is neither sealed nor sterile.
From the chocolate factory floor, Professor T is able to follow an employee's progress through the building on a CCTV screen. The view changes between different cameras throughout the factory, each one showing where the man is, but the Professor had no way of controlling which cameras' views would be shown on the screen.
After taking Donckers' dad to see the care home (and presumably back home again), Donckers and Winters drive to the crime scene. Only when they get out of the car does she ask "Did he [her dad] say anything to you?" Normally, one would ask something personal like that on the journey, rather waiting until they are at the crime scene and expected to be professional. This kind of thing is a common trope, merely a dramatic convenience.
Goswami feels the back of the suspect's car, presumably to see if it is still warm, but the engine is at the front. In any case, it makes little difference how long the car had been parked because its mere presence shows that the suspect is still there.