The Newton's cradle was then set in motion by releasing this ball and an elected member of the UK team answered quick-fire questions.
It could not be used if all five (four for series 2) questions had been answered correctly in a round.
At maximum level, it took 66 seconds before the ball stopped passing through the laser line.
Once this process had repeated itself four times, the National Lottery draws were run.
They should answer five questions correctly before the Newton's cradle, started at its maximum setting, stopped passing through the laser line in order to win a holiday, billed as the titular "five-star family reunion".