Having turned poster to gamekeeper in the last 6 months this is the first strike in 17 years that I haven't had to prepare for. Given the number of enquiries I've been feilding this past week from publishing customers, I thought it might be worth joing this discussion.
For those that may not be aware, Downstream Access Mail (DSA) is delivered by Royal Mail. Whilst past experience has shown me that there is a small advantage to using a DSA service during a period of strike action, given the time available it is unlikely that my own employer, DHL, along with TNT, Citipost DSA and one or two other DSA mail providers, will be able to implement a solution before the strikes begin. Hand delivery providers such as DX, Citipost and CMS and B2C courier firms are your only alternative options to RM delivery although it is also worth mentioning that they are pretty much restricted to city centre locations and business adresses only, with DX being the only supplier with anything like a national network. However, in the event that you do get one of these companies to agree to carry your mail, you may well find that a similar time issue could restrict your ability to implement a solution before the strikes begin.
Unless your pockets are deep and volumes significant, my advise would be to forget about looking for an alternative provider and consider if you are going to publish the printed journal that week (relevant to weeklies). If so, also consider if you are going to wrap and address the copies as usual and where they can be stored until they can be mailed.