Tax and Ni for a full time job?

JLS3405

I left my part time job end of January 2009 (£4k per annum) to take up a full tiem job starting February 2nd 2009 earning around £18k. When I handed over my P45 I was led to believe my first wage packet would be a "good" one....do I get taxed differently having been under the threshold for a year or so? And will my first pay be a good one?

Thanks for any info in advance!

fengirl_2

You have already asked this in employment and jobseeking and I have responded.