Yes, the month-to-month plan for InDesign (£27.34 inc VAT/month) can be cancelled and started again when required.
Thanks for your reply. I have already joined the month-to-month plan for InDesign. Please could you tell me how one goes about cancelation? What steps should I follow and how much in advance do I need to do it so that it doesn't roll over to the next month. Many thanks for your help.
Details here: Cancel your membership or subscription | Creative Cloud
You pay for the month upfront so if you cancel you still have access for the remainder of that billing month. If you need to cancel, you'd need to do it before the next bill date.