Wow!! … Including the HTML framing (probably the wrong word) in the body of an email widget makes it HTML!!
How come I am just learning this now!!! 
The “framing” required is
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
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</body>
</html>
and you can define styles in the <head> section too!!!