Hi Debbie
We will be sending your final documentation in plenty of time, usually around three weeks before departure, so I'd be very surprised if a postal strike caused a problem.
If it does, we will give you the reference number for your e-ticket over the phone (you don't need a ticket to check in) and we will hand any other documents to our tour manager or airport rep to give to you in person.
So nothing to worry about!
Kind regards,
Olly, your editor