Found.co.uk W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:addthis” not allowed here.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “Layer_1”.
Bad value “tel:0207 653 6709” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “home-h5”.
Duplicate attribute “style”.
No space between attributes.
Stray end tag “div”.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:addthis” is not serializable as XML 1.0.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “home-h5” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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