Advert suddenly appearing

Hi,

I have been updating my wordpress website this weekend. I have added some pictures and changed some words.

Now on one of the pages an advert keeps popping up on the page trying to sell shoes, t-shirts etc across the middle of the screen. (nothing to do with my business).

Do you know if there is a way of getting rid of this annoying ‘thing’??]

my site is http://www.aposrecruitment.co.uk
the problem occurs on the RECRUITERS tab.

Many thanks for any help.

Rob