Please have a look thank you ??

By looking at the source code you can also see some other CSS that is being applied (and overwriting your contact background image):

<style type="text/css" id="wp-custom-css">
			/*
You can add your own CSS here.

Click the help icon above to learn more.
*/

/*
body {
    background-image: url('https://www.northern-horizons.co.uk/_images/pictures/N005_473898204.jpg') 
 !important;
background-size: cover;

}*/

body {
 background-image: url('https://fabupnorth.com/wp/wp-content/uploads/2017/08/fablogo1.png')
!important ;

}

.header,
.header-content-wrap,
.packages,
.contact-us {
    background: none repeat scroll 0% 0% rgba(0, 0, 0, 0) !important;
}

.big-title-container {
background: rgba(240, 24, 0, 0.27);
}

		</style>

Specifically this:

.header,
.header-content-wrap,
.packages,
.contact-us {
    background: none repeat scroll 0% 0% rgba(0, 0, 0, 0) !important;
}

That looks like custom CSS that was added at one time, so you should be able to remove the ‘contact-us’ selector from it. E.g:

.header,
.header-content-wrap,
.packages {
    background: none repeat scroll 0% 0% rgba(0, 0, 0, 0) !important;
}