The strike, now in its sixth week, is likely to cause supply problems for months and has yet to be resolved.
This has forced many publishers, including Haymarket, publisher of PRWeek, to put emergency plans in place.
PRWeek will trim the number of pages it prints until the supply problems are overcome, after which normal service will resume.
The magazine will, however, continue to increase the quantity of information published online. There will be extra content on weekly news bulletins and a major relaunch of the website is planned for late summer.
For further information go to WWW.PRWEEK.COM.