The Chuckle Brothers explain how to read the time on an analogue clock to the nearest 5 minutes. They also show how to calculate time intervals and find start or end times for a given time interval.
Pupils can watch this clip with a toy clock in their hands to follow along with, as the various times come up. The clip can be paused at an appropriate point and pupils instructed to write on their mini whiteboards what time they think the important guest will arrive at. They can then be instructed to state how long this will be from the time now. This can help the teacher to assess how well pupils are able to find differences between times and also add with time.