Im preview they both work, but on the website the iframe does not.
I have tried taking the LL content stack - the iframe, out of any other stacks except a section pro and moved it to the bottom of the page, but still I cant get it to show the content (the framed site) when it is on the my site.
Either make your site non-secure (obviously not recommended) or get the unitary lottery people to make their site SSL (which they really should have done already)
Would this not be an ideal opportunity to offer your services to the lottery people ? it may be that nobody has raised this issue with them and that they are in need of your expertise - just a thought
Paul