Some errors apparently on my website?

Hi

We have setup a new business and a new website. The site looks perfect on my pc both in FF, Chrome and IE and on my ipad, which of course is all I have to work on.

This is not a sales pitch by the way, I’m not trying to get incoming links or whatever, I genuinely need to make sure that the site works.

Please take a look, I would appreciate some feedback on errors you see, both in normal view and as a responsive theme.

https://www.smarterbarcodes.co.uk/

Really appreciate your help :0)