Term time only confusion

[Olivia2007]

I changed my hours from full time to part time term time only in April 2013. I work mon-fri 9 till 3pm term time only

I have feb, easter, may, july/aug, October and xmas off. I do not have off training days etc or any additional leave. I work that as 11 weeks.

Work gave me a salary and I went with that. I spoke to HR today about increasing my hours from 9-3 to 9-5 term time only.

HR when working my salary out said my manager advised them I work 38 weeks a year and that's what I'm paid for. I see it as 40/41 weeks?

Can someone explain to me how this works and if I'm right what I can do about the money i've lost.

Feb half term 1 week
EASTER 2 weeks
May HT 1 week
Summer holidays 6 weeks
Oct half term 1 week
Christmas 2 weeks

That's 13 weeks.

UK State Term Time is 195 days, or 39 weeks, with 5 inset days which I assume you don't work. So that comes to 38 weeks you work.

I do Work inset days. I'm not based in a school.
So I assume that mean I should get paid for 39 weeks a year.

Well, you need to work it out exactly! Surely you know which days you do and don't work, so can you go back over the last year and work it out?

Can I just add into it...Are you working B/h and do you get paid for them to work it out?