Mobile Hamburger Menu Dissappeared

Hello,

I have been developing a page for a the past week and noticed my Hamburger menu has disappeared on my mobile site. I have tried disabling any of the new plugins but still it does not show.

I have searched the forum for people with similar issues but the solutions do not seem to work on my site.

Can anybody steer me in the right direction?

Thanks,

http://limerickcyclingtours.ie/