I think its well worth it. We did the standard course, think it's 6 weeks. Then I met up with the mums on a regular basis after we all gave birth. We attended classes together, arranged get together with the mums and dads. We did a weekly coffee afternoon, rotating round each of our houses. You have to put the effort in to keep in touch but it's well worth it.
We didn't do NCT but we went to baytree bumps which is the same for half the price . Jen who runs them are great and they for little reunions and coffee mornings every month so everyone can have a catch up .
https://www.baytreebumps.com
Hi I did NCT couple years ago. You just need to go on their website and see what are the nearest courses in your area that cover your due date. It’s typically 2-3 months before a due date. I still have a contact with a girls that I had a course with. Most of them are already having second child 😄