X Isle (and a few others) this is the report back from our hosts:-
Hi Ian,
I still don't have this alert coming up for me on my mobile or computer when I browse the site and I have used SiteCheck and it has come up to say the site is clean, so I don't know where this is coming from. The site PHPBB version does need an upgrade so will look into doing that which may possibly help. Simon
This probably won't help but I find it doesn't happen for a while theb will happen and keep happening repeatedly for the next say 10 mins. So I assume its to do with an ad at the top as they change. Would a screenshot help next time?