I have booked this trip departing Manchester 9th May and have been advised today that there are just 4 people booked so far

Is it subject to a minimum number of people and if so at what point is a decision made to cancel it please?

There are 4 people booked on the main tour only and another traveller booked to take the Yangtze Gorges add-on.

All of our tours operate subject to minimum numbers, and in the unfortunate event that we have to cancel a holiday because these are not met, then we will do so before the date that your final balance is due.

Kindest regards,

Julia