I had to look up Elkes and it appears they're part of Fox's. I don't buy their biskwits since emailing them to complain about the microscopically thin chocolate bit in their Viennese Sandwich not looking like the 5mm thick version in the photo on the packet. They basically said "So what?"
The subject line of my email was 'Less yum per crumb'!
I did observe recently that they have removed the photo from the packaging, rather than actually provide the amount of chocolate it used to imply one would get.