@font-face {
     font-family: 'AvenirBook';
     src: local('AvenirBook'),
         url('https://orapi.yellow-dev.co.uk/webfonts/avenir-book.woff') format('woff'),
         url('https://orapi.yellow-dev.co.uk/webfonts/avenir-book.ttf') format('ttf'),
     font-weight: normal;
     font-style: normal;
     font-display: swap;
}
 
/*
Include an additional @font-face block for each font file in the family.
Change the font-weight and font-style value to match each font file
*/
@font-face {
     font-family: 'AvenirBook';
     src: local('AvenirBook'),
         url('https://orapi.yellow-dev.co.uk/wp-content/webfont/Avenir-Book.woff') format('woff'),
     font-weight: bold;
     font-style: normal;
     font-display: swap;
 }

 @font-face {
     font-family: 'AvenirBook';
     src: local('AvenirBook'),
         url('https://orapi.yellow-dev.co.uk/wp-content/webfont/Avenir-Book.woff') format('woff'),
     font-weight: normal;
     font-style: italic;
     font-display: swap;
}