The first issue would be more expensive as you will need to establish the design for the publication. A couple of design routes and two or three rounds of revisions between you and the agency should be no more than £1,200.
Artworking of each issue - helps to work on a per page basis or between £85 and £120 depending upon complexity of information, presence of tables, graphs, image research etc etc. I'm sure you will get discounts on the page rate the more you opt for.
I would suggest that (ball park) you would be looking at roughly £2k for the first issue of an 8 pager and 1k for subsequent editions, £2.9k for first 16 pager and £1.7k thereafter, £3.4k and £2.2k thereafter.
Cost of print will depend on many variables but there are some great deals to be had from printers at present. Good luck!
