Cannot resolve non-www domain however www-domain works perfectly fine

I have a digitalocean droplet setup with the LAMP droplet and have set this up to the URL www.gavk.co.uk - it loads fine if I include the ‘www’ in the URL but if I remove the ‘www’ it never loads.

Here is my virtual hosts entry in the conf file

<VirtualHost *:80>
    ServerAdmin admin@gavk.co.uk
    ServerName gavk.co.uk
    ServerAlias www.gavk.co.uk
    DocumentRoot /var/www/gavkcouk/public_html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    <IfModule mod_dir.c>
        DirectoryIndex index.php index.pl index.cgi index.html index.xhtml >
    </IfModule>
</VirtualHost>

When I ping gavk.co.uk from the terminal I get the error ping: cannot resolve gavk.co.uk: Unknown host (but works fine if I ping www.gavk.co.uk)

Below is the DNS and A records that I have setup in the digitalocean control panel (see the image link below) so I have the 3 nameserver entries and then the 2 A records (I have added two as I want to setup certbot and it recommends adding 2 A records one www and one non-www)

Image link of my A records

Can anyone suggest what I am doing wrong - I just want both gavk.co.uk & www.gavk.co.uk to resolve so they show the exact same webpage.

Thanks in advance