Error 403 when trying to access localhost

Good morning all.

I run a small in office dev (xampp) server for the build of static and WordPress websites on my Ubuntu machine.

I use vhosts for which two are workingabsolutly fine. However, I have another which for some reason keeps failing when I try to load the site.

My Xampp install is a typical /opt/lampp install, nothing unique or special.

My vhosts File

##Summerschool Development Version (which works fine)
<VirtualHost *:80>
    DocumentRoot "/opt/lampp/htdocs/summerschooldev"
    ServerName summerschoolforteensuk.com
    <Directory "/opt/lampp/htdocs/summerschooldev/">
    Options Indexes FollowSymLinks Includes ExecCGI
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

##Summerschool old website (which works fine)
<VirtualHost *:80>
    DocumentRoot "/opt/lampp/htdocs/summerschool"
    ServerName summerschoolold.com
    <Directory "/opt/lampp/htdocs/summerschool/">
    Options Indexes FollowSymLinks Includes ExecCGI
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

##scp old website throws error 403 You don't have permission to access / on this server..
<VirtualHost *:80>
    DocumentRoot "/opt/lampp/htdocs/scp"
    ServerName scpold.com
    <Directory "/opt/lampp/htdocs/scp/">
    Options Indexes FollowSymLinks Includes ExecCGI
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

Now my hosts file

127.0.0.1   summerschoolforteensuk.com
127.0.0.1   summerschoolold.com
127.0.0.1   scpold.com

From what I can see, everything seems to be working fine. Im relativly new to working like this but poor internet speed at my office means I have to. Im guessing that there is not error here as the other two sites work fine.

Is there something Im missing if not where would I look next.

Thanks