did the same as you a few months back
you need to register for VAT and get a vat form 4a filled out by both yourself and the landlord, the vat on my 25 yr lease was 94,000 so you need to do this first before you sign anything. the revenue will give you a 4b form which means you wont have to pay any vat.
Stamp duty is payable on short leases, i cant for the life of me think if i paid stamp or not!
Rates are decided by the county council but if its a new development it will take a couple of months for them to come out, you could always ring and ask them but I dont think it would be a good idea to alert them to your pressence just yet! If you can ask other business owners in the area what their rates are it will give you an indication of what they may be
but as the previous poster said, you wouldnt find much info on the net and a solicitor and accountant are the people you need to talk to.