Hi Paul,
I see you offered to help in regards to the embed code. I have a similar problem. If I add and embed block with Iframe with either Link or code snippet it breaks the whole page.
This is the link to the actual page: https://ala-turka.co.uk/westgate-reservation
Thisis the code I am trying to embed.
<div class "reservation"> <iframe class="reservationresp" src="https://app.rightreservation.co.uk/apps/reservation/12/step1" style=" border-width:0" "width="800" height="600" frameborder="0" scrolling="no" max-width: 100% </iframe></div>